/**
 * general.js
 *
 * Copyright (c) 2003-2006 John Willinsky
 * Distributed under the GNU GPL v2. For full terms see the file docs/COPYING.
 *
 * Site-wide common JavaScript functions. 
 *
 * $Id: general.js,v 1.18 2006/06/12 23:26:06 alec Exp $
 */

/**
 *  Added: add functions that constitute a function handler for window.onload, no matter 
 */

/*************************************************************
 * Window Onload Manager (WOM) v1.0
 * Author: Justin Barlow - www.netlobo.com
 *
 * Description:
 * The WOM library of functions allows you to easily call
 * multiple javascript functions when your page loads.
 *
 * Usage:
 * Add functions to WOM using the womAdd() function. Pass the
 * name of your functions (with or without parameters) into
 * womAdd(). Then call womOn() like this:
 *     womAdd('hideDiv()');
 *     womAdd('changeBg("menuopts","#CCCCCC")');
 *     womOn();
 * WOM will now run when your page loads and run all of the
 * functions you have added using womAdd()
 *************************************************************/

/*************************************************************
 * The womOn() function will set the window.onload function to
 * be womGo() which will run all of your window.onload
 * functions.
 *************************************************************/
function womOn(){
	window.onload = womGo;
}

/*************************************************************
 * The womGo() function loops through the woms array and
 * runs each function in the array.
 *************************************************************/
function womGo(){
	for(var i = 0;i < woms.length;i++)
		eval(woms[i]);
}

/*************************************************************
 * The womAdd() function will add another function to the woms
 * array to be run when the page loads.
 *************************************************************/
function womAdd(func){
	woms[woms.length] = func;
}

/*************************************************************
 * The woms array holds all of the functions you wish to run
 * when the page loads.
 *************************************************************/
var woms = new Array();


/**
 *  Added: define an array of journal-specific URL atoms; these must be changed if changed in the
 *         OJS management interface, of course
 */
var jnl_abbrevs = new Array(
	'dev'
	, 'esynapse'
	, 'novel-contribs'
);
var ojs_base_href = 'http://ojs.med.utah.edu';

/**
 * Added; provide a Javascript-loading function; provide a stylesheet file-loading function
 */
var js_path = ojs_base_href + '/js/';
function js_include( scriptname ){
	var script = document.createElement( "script" );
	script.src = js_path + scriptname + '.js';
	script.type = 'text/javascript';
	var head = document.getElementsByTagName( 'head' ).item(0);
	if( head.appendChild( script ) ) return true;
}
var cssfile_path = ojs_base_href;
function style_include( css_jnl_uri ){
	var csselem = document.createElement( "link" );
	csselem.href = ojs_base_href + css_jnl_uri;
	csselem.type = 'text/css';
	csselem.rel = 'stylesheet';
	var head = document.getElementsByTagName( 'head' ).item(0);
	if( head.appendChild( csselem ) ) return true;
	return false;
}

/**
 *  Added: test DOM of loaded document to see if target elements have loaded; if not,
 *         set a timeout
 *         This code adapted from:  http://javascript.about.com/library/blfastdom.htm
 */
var pageLoaded = 0;
window.onload = function() { pageLoaded = 1; }
function loadedID( i, f ) {
	myObj = document.getElementById( i );
	if( document.getElementById && ( myObj != null ) ){
		f();
		return myObj;
	}
	else if( !pageLoaded ){
		setTimeout( 'loadedID( \''+i+'\', '+f+' )', 100 );
		return false;
	}
}
// This function should be called in the knowledge that there may be multiple instances
//    per tagname i, returned in an array, which surrounding logic must accommodate.
//    Param 3 is an array number in the array of returned tags found.
function loadedTag( i, f, arrNum ) {
	arr = document.getElementsByTagName( i );
	if( document.getElementById && ( arr.length>0 ) ){
		if ( arrNum ) {
			f( arr[arrNum] );
		}
		else {
			f(arr[0]);
		}
		return arr;
	}
	else if( !pageLoaded ){
		// alert('loadedTag( \''+i+'\', '+f+', '+arrNum+' )');
		setTimeout( 'loadedTag( \''+i+'\', '+f+', '+arrNum+' )', 100 );
		return false;
	}
}

/*  Added:  Allows controlling styles on the fly to accommodate last-loading plugin stylesheets with global scope
 *          that break per-journal styling
 *          Public domain code from: http://www.hunlock.com/blogs/Totally_Pwn_CSS_with_Javascript
 */
function getCSSRule(ruleName, deleteFlag) {               // Return requested style obejct
   ruleName=ruleName.toLowerCase();                       // Convert test string to lower case.
   if (document.styleSheets) {                            // If browser can play with stylesheets
      for (var i=0; i<document.styleSheets.length; i++) { // For each stylesheet
         var styleSheet=document.styleSheets[i];          // Get the current Stylesheet
         var ii=0;                                        // Initialize subCounter.
         var cssRule=false;                               // Initialize cssRule. 
         do {                                             // For each rule in stylesheet
            if (styleSheet.cssRules) {                    // Browser uses cssRules?
               cssRule = styleSheet.cssRules[ii];         // Yes --Mozilla Style
            } else {                                      // Browser usses rules?
               cssRule = styleSheet.rules[ii];            // Yes IE style. 
            }                                             // End IE check.
            if (cssRule)  {                               // If we found a rule...
               if (cssRule.selectorText.toLowerCase()==ruleName) { //  match ruleName?
                  if (deleteFlag=='delete') {             // Yes.  Are we deleteing?
                     if (styleSheet.cssRules) {           // Yes, deleting...
                        styleSheet.deleteRule(ii);        // Delete rule, Moz Style
                     } else {                             // Still deleting.
                        styleSheet.removeRule(ii);        // Delete rule IE style.
                     }                                    // End IE check.
                     return true;                         // return true, class deleted.
                  } else {                                // found and not deleting.
                     return cssRule;                      // return the style object.
                  }                                       // End delete Check
               }                                          // End found rule name
            }                                             // end found cssRule
            ii++;                                         // Increment sub-counter
         } while (cssRule)                                // end While loop
      }                                                   // end For loop
   }                                                      // end styleSheet ability check
   return false;                                          // we found NOTHING!
}                                                         // end getCSSRule 

function killCSSRule(ruleName) {                          // Delete a CSS rule   
   return getCSSRule(ruleName,'delete');                  // just call getCSSRule w/delete flag.
}                                                         // end killCSSRule

function addCSSRule(ruleName) {                           // Create a new css rule
   if (document.styleSheets) {                            // Can browser do styleSheets?
      if (!getCSSRule(ruleName)) {                        // if rule doesn't exist...
         if (document.styleSheets[0].addRule) {           // Browser is IE?
            document.styleSheets[0].addRule(ruleName, null,0);      // Yes, add IE style
         } else {                                         // Browser is IE?
            document.styleSheets[0].insertRule(ruleName+' { }', 0); // Yes, add Moz style.
         }                                                // End browser check
      }                                                   // End already exist check.
   }                                                      // End browser ability check.
   return getCSSRule(ruleName);                           // return rule we just created.
}

/**
 * Prompt user for confirmation prior to loading a URL.
 */
function confirmAction(url, msg) {
	if (confirm(msg)) {
		if (url) {
			document.location.href=url;
		}
		return true;
	}
	return false;
}

/**
 * Open window displaying help.
 */
function openHelp(url) {
	window.open(url, 'Help', 'width=700,height=600,screenX=100,screenY=100,toolbar=0,scrollbars=1');
}

/**
 * Open window displaying comments.
 */
function openComments(url) {
	window.open(url, 'Comments', 'width=700,height=600,screenX=100,screenY=100,toolbar=0,resizable=1,scrollbars=1');
}

/**
 * Open window for preview.
 */
function openWindow(url) {
	window.open(url, 'Window', 'width=600,height=550,screenX=100,screenY=100,toolbar=0,resizable=1,scrollbars=1');
}

/**
 * Open window for reading tools.
 */
function openRTWindow(url) {
	window.open(url, 'RT', 'width=700,height=500,screenX=100,screenY=100,toolbar=0,resizable=1,scrollbars=1');
}
function openRTWindowWithToolbar(url) {
	window.open(url, 'RT', 'width=700,height=500,screenX=100,screenY=100,toolbar=1,resizable=1,scrollbars=1');
}

/**
 * browser object availability detection
 * @param objectId string of object needed
 * @param style int (0 or 1) if style object is needed
 * @return javascript object specific to current browser
 */
function getBrowserObject(objectId, style) {
	var isNE4 = 0;
	var currObject;

	// browser object for ie5+ and ns6+
	if (document.getElementById) {
		currObject = document.getElementById(objectId);
	// browser object for ie4+
	} else if (document.all) {
		currObject = document.all[objectId];
	// browser object for ne4
	} else if (document.layers) {
		currObject = document.layers[objectId];
		isNE4 = 1;
	} else {
		// do nothing
	}
	
	// check if style is needed
	if (style && !isNE4) {
		currObject = currObject.style;
	}
	
	return currObject;
}

/**
 * Load a URL.
 */
function loadUrl(url) {
document.location.href=url;	
}

// Added v2.2
function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

// Added v2.2
function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

/**
 * Asynchronous request functions
 */
// Added v2.2
function makeAsyncRequest(){
	var req=(window.XMLHttpRequest)?new XMLHttpRequest():new ActiveXObject('Microsoft.XMLHTTP');
	return req;
}

// Added v2.2
function sendAsyncRequest(req, url, data, method) {
	var header = 'Content-Type:text/html; Charset=utf-8';
	req.open(method, url, true);
	req.setRequestHeader(header.split(':')[0],header.split(':')[1]);
	req.send(data);
}


/**
 * Change the form action
 * @param formName string
 * @param action string 
 */
// Added v2.2
function changeFormAction(formName, action) {
	document.forms[formName].action = action;
	document.forms[formName].submit();
}


/**
 *  Added 2.1.1 (all below):  load Javascripts specific to individual journal URLs.
 */
function setJnlOnloadScript() {
	//   NOTE that these scripts will only run after the entire DOM has loaded!  Each script
	//   should contain functions pagePreloadControl() and page PostloadControl() that can
	//   be called further on in this or other scripts loaded afterward.
	var i;
	for( i in jnl_abbrevs  ) {
		if( self.document.location.href.match( '/' + jnl_abbrevs[i] ) ) {
			js_include( jnl_abbrevs[i] );
			break;
		}
	}
}

// Set a control var that is set to a FALSE-evaluating value by journal-specific scripts if page
//    specific HTML does not need to be inserted
var setPgHTML = true;
setJnlOnloadScript();

function pgGenPostLoadInit ( ) {
	// alert( "Hi there from the General!" );
}

womAdd('pgGenPostLoadInit()');

// WebReference.com Javascript browser sniffer (used to inject <head> HTML if a browser is IE,
//   to load an IE-only stylesheet) -- see page source,
//   http://www.webreference.com/tools/browser/javascript.html
//
// JavaScript Browser Sniffer
// Eric Krok, Andy King, Michel Plungjan Jan. 31, 2002
// see http://www.webreference.com/ for more information
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
// please send any improvements to aking@internet.com and we'll
// roll the best ones in
//
// adapted from Netscape's Ultimate client-side JavaScript client sniffer
// and andy king's sniffer
// Revised May 7 99 to add is.nav5up and is.ie5up (see below). (see below).
// Revised June 11 99 to add additional props, checks
// Revised June 23 99 added screen props - gecko m6 doesn't support yet - abk
//                    converted to var is_ from is object to work everywhere
// 990624 - added cookie forms links frames checks - abk
// 001031 - ie4 mod 5.0 -> 5. (ie5.5 mididentified - abk)
//          is_ie4 mod tp work with ie6+ - abk
// 001120 - ns6 released, document.layers false, put back in
//        - is_nav6 test added - abk
// 001121 - ns6+ added, used document.getElementById, better test, dom-compl
// 010117 - actual version for ie3-5.5 by Michel Plungjan
// 010118 - actual version for ns6 by Michel Plungjan
// 010217 - netscape 6/mz 6 ie5.5 onload defer bug docs - abk
// 011107 - added is_ie6 and is_ie6up variables - dmr
// 020128 - added link to netscape's sniffer, on which this is based - abk
//          updated sniffer for aol4-6, ie5mac = js1.4, TVNavigator, AOLTV,
//          hotjava
// 020131 - cleaned up links, added more links to example object detection
// 020131 - a couple small problems with Opera detection. First, when Opera
//          is set to be compatible with other browsers it will contain their
//          information in the userAgent strings. Thus, to be sure we have 
//          Opera we should check for it before checking for the other bigs.
//          (And make sure the others are !opera.) Also corrected a minor
//          bug in the is_opera6up assignment.
// 020214 - Added link for Opera/JS compatibility; added improvements for 
//          windows xp/2000 id in opera and aol 7 id (thanks to Les
//          Hill, Les.Hill@getronics.com, for the suggestion).
// 020531 - Added N6/7 and moz identifiers. 
// 020605 - Added mozilla guessing, Netscape 7 identification, and cleaner
//          identification for Netscape 6. (this comment added after code 
//          changes)
// 020725 - Added is_gecko. -- dmr
// 021205 - Added is_Flash and is_FlashVersion, based on Doc JavaScript code. 
//          Added Opera 7 variables. -- dmr
// 021209 - Added aol8. -- dmr
// 030110 - Added is_safari, added 1.5 js designation for Opera 7. --dmr
// 030128 - Added is_konq, per user suggestion (thanks to Sam Vilain).
//          Removed duplicate Opera checks left over after last revision. - dmr
// 031124 - Added is_fb and version. We report this right after the is_moz
//          report. - dmr
// 040325 - Added is_fx and version. We report this right after the is_moz
//          report. - dmr
// 040421 - Added Debian check to is_moz. Thanks to Patrice Bridoux for
//          reporting this.
// 040517 - Added is_fb/is_fx to plugins based flash detection. Thanks to 
//          Martin Bischoff for pointing out this omission.
// 040617 - On Mac IE, appVersion differs from the version in the ua, 
//          with the UA appearing to be more accurate. As an experiment, 
//          for Mac we'll pull is_minor from the ua instead.
// 040831 - Fixed Opera bug in flash detection logic; when Opera has
//          "enable plugins" unchecked in preferences, the "plugin" 
//          variable is still true, but the "description" property 
//          belonging to it is undefined.
// 051202 - Added ua check for higher versions of Firefox (1.5+), 
//          since vendor/vendorSub is no longer used and the sniffer 
//          was assuming Mozilla. Also belatedly added is_nav8 and 
//          is_nav8up.
// 060919 - Some catchup mods here; adding is_opera8, is_opera9, 
//          and IE7 (thanks to Jonathan Warrington)
// 061009 - Added is_macosx check and safari to Flash checking, per 
//          Michael Hopkins 
//
// Everything you always wanted to know about your JavaScript client
// but were afraid to ask. Creates "is_" variables indicating:
// (1) browser vendor:
//     is_nav, is_ie, is_opera
// (2) browser version number:
//     is_major (integer indicating major version number: 2, 3, 4 ...)
//     is_minor (float   indicating full  version number: 2.02, 3.01, 4.04 ...)
// (3) browser vendor AND major version number
//     is_nav2, is_nav3, is_nav4, is_nav4up, is_nav5, is_nav5up, 
//     is_nav6, is_nav6up, is_ie3, is_ie4, is_ie4up, is_ie5up, is_ie6...
// (4) JavaScript version number:
//     is_js (float indicating full JavaScript version number: 1, 1.1, 1.2 ...)
// (5) OS platform and version:
//     is_win, is_win16, is_win32, is_win31, is_win95, is_winnt, is_win98
//     is_os2
//     is_mac, is_mac68k, is_macppc
//     is_unix
//        is_sun, is_sun4, is_sun5, is_suni86
//        is_irix, is_irix5, is_irix6
//        is_hpux, is_hpux9, is_hpux10
//        is_aix, is_aix1, is_aix2, is_aix3, is_aix4
//        is_linux, is_sco, is_unixware, is_mpras, is_reliant
//        is_dec, is_sinix, is_freebsd, is_bsd
//     is_vms
//
// based in part on 
// http://www.mozilla.org/docs/web-developer/sniffer/browser_type.html
// The Ultimate JavaScript Client Sniffer
// and Andy King's object detection sniffer
//
// Note: you don't want your Nav4 or IE4 code to "turn off" or
// stop working when Nav5 and IE5 (or later) are released, so
// in conditional code forks, use is_nav4up ("Nav4 or greater")
// and is_ie4up ("IE4 or greater") instead of is_nav4 or is_ie4
// to check version in code which you want to work on future
// versions. For DOM tests scripters commonly used the 
// is_getElementById test, but make sure you test your code as
// filter non-compliant browsers (Opera 5-6 for example) as some 
// browsers return true for this test, and don't fully support
// the W3C's DOM1.
//

    // convert all characters to lowercase to simplify testing
    var agt=navigator.userAgent.toLowerCase();
    var appVer = navigator.appVersion.toLowerCase();

    // *** BROWSER VERSION ***

    var is_minor = parseFloat(appVer);
    var is_major = parseInt(is_minor);

    var is_opera = (agt.indexOf("opera") != -1);
    var is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
    var is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
    var is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
    var is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
    var is_opera6 = (agt.indexOf("opera 6") != -1 || agt.indexOf("opera/6") != -1); // 020128- abk
    var is_opera7 = (agt.indexOf("opera 7") != -1 || agt.indexOf("opera/7") != -1); // 021205- dmr
    var is_opera8 = (agt.indexOf("opera 8") != -1 || agt.indexOf("opera/8") != -1); // 09-19-2006 jonw 
    var is_opera9 = (agt.indexOf("opera 9") != -1 || agt.indexOf("opera/9") != -1); // 09-19-2006 jonw

    var is_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);
    var is_opera6up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5); // new020128
    var is_opera7up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5 && !is_opera6); // new021205 -- dmr
    var is_opera8up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5 && !is_opera6 && !is_opera7); // 09-19-2006 - jonw
    var is_opera9up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5 && !is_opera6 && !is_opera7 &&!is_opera8); // 09-19-2006 - jonw

    // Note: On IE, start of appVersion return 3 or 4
    // which supposedly is the version of Netscape it is compatible with.
    // So we look for the real version further on in the string
    // And on Mac IE5+, we look for is_minor in the ua; since 
    // it appears to be more accurate than appVersion - 06/17/2004

    var is_mac = (agt.indexOf("mac")!=-1);
    var iePos  = appVer.indexOf('msie');
    if (iePos !=-1) {
       if(is_mac) {
           var iePos = agt.indexOf('msie');
           is_minor = parseFloat(agt.substring(iePos+5,agt.indexOf(';',iePos)));
       }
       else is_minor = parseFloat(appVer.substring(iePos+5,appVer.indexOf(';',iePos)));
       is_major = parseInt(is_minor);
    }

    // ditto Konqueror
                                      
    var is_konq = false;
    var kqPos   = agt.indexOf('konqueror');
    if (kqPos !=-1) {                 
       is_konq  = true;
       is_minor = parseFloat(agt.substring(kqPos+10,agt.indexOf(';',kqPos)));
       is_major = parseInt(is_minor);
    }                                 

    var is_getElementById   = (document.getElementById) ? "true" : "false"; // 001121-abk
    var is_getElementsByTagName = (document.getElementsByTagName) ? "true" : "false"; // 001127-abk
    var is_documentElement = (document.documentElement) ? "true" : "false"; // 001121-abk

    var is_safari = ((agt.indexOf('safari')!=-1)&&(agt.indexOf('mac')!=-1))?true:false;
    var is_khtml  = (is_safari || is_konq);

    var is_gecko = ((!is_khtml)&&(navigator.product)&&(navigator.product.toLowerCase()=="gecko"))?true:false;
    var is_gver  = 0;
    if (is_gecko) is_gver=navigator.productSub;

    var is_fb = ((agt.indexOf('mozilla/5')!=-1) && (agt.indexOf('spoofer')==-1) &&
                 (agt.indexOf('compatible')==-1) && (agt.indexOf('opera')==-1)  &&
                 (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1)     &&
                 (is_gecko) && (navigator.vendor=="Firebird"));
    var is_fx = ((agt.indexOf('mozilla/5')!=-1) && (agt.indexOf('spoofer')==-1) &&
                 (agt.indexOf('compatible')==-1) && (agt.indexOf('opera')==-1)  &&
                 (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1)     &&
                 (is_gecko) && ((navigator.vendor=="Firefox")||(agt.indexOf('firefox')!=-1)));
    var is_moz   = ((agt.indexOf('mozilla/5')!=-1) && (agt.indexOf('spoofer')==-1) &&
                    (agt.indexOf('compatible')==-1) && (agt.indexOf('opera')==-1)  &&
                    (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1)     &&
                    (is_gecko) && (!is_fb) && (!is_fx) &&
                    ((navigator.vendor=="")||(navigator.vendor=="Mozilla")||(navigator.vendor=="Debian")));
    if ((is_moz)||(is_fb)||(is_fx)) {  // 032504 - dmr
       var is_moz_ver = (navigator.vendorSub)?navigator.vendorSub:0;
       if(is_fx&&!is_moz_ver) {
           is_moz_ver = agt.indexOf('firefox/');
           is_moz_ver = agt.substring(is_moz_ver+8);
           is_moz_ver = parseFloat(is_moz_ver);
       }
       if(!(is_moz_ver)) {
           is_moz_ver = agt.indexOf('rv:');
           is_moz_ver = agt.substring(is_moz_ver+3);
           is_paren   = is_moz_ver.indexOf(')');
           is_moz_ver = is_moz_ver.substring(0,is_paren);
       }
       is_minor = is_moz_ver;
       is_major = parseInt(is_moz_ver);
    }
   var is_fb_ver = is_moz_ver;
   var is_fx_ver = is_moz_ver;

    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1)
                && (!is_khtml) && (!(is_moz)) && (!is_fb) && (!is_fx));

    // Netscape6 is mozilla/5 + Netscape6/6.0!!!
    // Mozilla/5.0 (Windows; U; Win98; en-US; m18) Gecko/20001108 Netscape6/6.0
    // Changed this to use navigator.vendor/vendorSub - dmr 060502   
    // var nav6Pos = agt.indexOf('netscape6');
    // if (nav6Pos !=-1) {
    if ((navigator.vendor)&&
        ((navigator.vendor=="Netscape6")||(navigator.vendor=="Netscape"))&&
        (is_nav)) {
       is_major = parseInt(navigator.vendorSub);
       // here we need is_minor as a valid float for testing. We'll
       // revert to the actual content before printing the result. 
       is_minor = parseFloat(navigator.vendorSub);
    }

    var is_nav2 = (is_nav && (is_major == 2));
    var is_nav3 = (is_nav && (is_major == 3));
    var is_nav4 = (is_nav && (is_major == 4));
    var is_nav4up = (is_nav && is_minor >= 4);  // changed to is_minor for
                                                // consistency - dmr, 011001
    var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) ||
                          (agt.indexOf("; nav") != -1)) );

    var is_nav6   = (is_nav && is_major==6);    // new 010118 mhp
    var is_nav6up = (is_nav && is_minor >= 6); // new 010118 mhp

    var is_nav5   = (is_nav && is_major == 5 && !is_nav6); // checked for ns6
    var is_nav5up = (is_nav && is_minor >= 5);

    var is_nav7   = (is_nav && is_major == 7);
    var is_nav7up = (is_nav && is_minor >= 7);

    var is_nav8   = (is_nav && is_major == 8);
    var is_nav8up = (is_nav && is_minor >= 8);

    var is_ie   = ((iePos!=-1) && (!is_opera) && (!is_khtml));
    var is_ie3  = (is_ie && (is_major < 4));

    var is_ie4   = (is_ie && is_major == 4);
    var is_ie4up = (is_ie && is_minor >= 4);
    var is_ie5   = (is_ie && is_major == 5);
    var is_ie5up = (is_ie && is_minor >= 5);
    
    var is_ie5_5  = (is_ie && (agt.indexOf("msie 5.5") !=-1)); // 020128 new - abk
    var is_ie5_5up =(is_ie && is_minor >= 5.5);                // 020128 new - abk
	
    var is_ie6   = (is_ie && is_major == 6);
    var is_ie6up = (is_ie && is_minor >= 6);

    var is_ie7   = (is_ie && is_major == 7);
    var is_ie7up = (is_ie && is_minor >= 7);

// KNOWN BUG: On AOL4, returns false if IE3 is embedded browser
    // or if this is the first browser window opened.  Thus the
    // variables is_aol, is_aol3, and is_aol4 aren't 100% reliable.

    var is_aol   = (agt.indexOf("aol") != -1);
    var is_aol3  = (is_aol && is_ie3);
    var is_aol4  = (is_aol && is_ie4);
    var is_aol5  = (agt.indexOf("aol 5") != -1);
    var is_aol6  = (agt.indexOf("aol 6") != -1);
    var is_aol7  = ((agt.indexOf("aol 7")!=-1) || (agt.indexOf("aol7")!=-1));
    var is_aol8  = ((agt.indexOf("aol 8")!=-1) || (agt.indexOf("aol8")!=-1));

    var is_webtv = (agt.indexOf("webtv") != -1);
    
    // new 020128 - abk
    
    var is_TVNavigator = ((agt.indexOf("navio") != -1) || (agt.indexOf("navio_aoltv") != -1)); 
    var is_AOLTV = is_TVNavigator;

    var is_hotjava = (agt.indexOf("hotjava") != -1);
    var is_hotjava3 = (is_hotjava && (is_major == 3));
    var is_hotjava3up = (is_hotjava && (is_major >= 3));

    // end new
	
    // *** JAVASCRIPT VERSION CHECK ***
    // Useful to workaround Nav3 bug in which Nav3
    // loads <SCRIPT LANGUAGE="JavaScript1.2">.
    // updated 020131 by dragle
    var is_js;
    if (is_nav2 || is_ie3) is_js = 1.0;
    else if (is_nav3) is_js = 1.1;
    else if ((is_opera5)||(is_opera6)) is_js = 1.3; // 020214 - dmr
    else if (is_opera7up) is_js = 1.5; // 031010 - dmr
    else if (is_khtml) is_js = 1.5;   // 030110 - dmr
    else if (is_opera) is_js = 1.1;
    else if ((is_nav4 && (is_minor <= 4.05)) || is_ie4) is_js = 1.2;
    else if ((is_nav4 && (is_minor > 4.05)) || is_ie5) is_js = 1.3;
    else if (is_nav5 && !(is_nav6)) is_js = 1.4;
    else if (is_hotjava3up) is_js = 1.4; // new 020128 - abk
    else if (is_nav6up) is_js = 1.5;

    // NOTE: In the future, update this code when newer versions of JS
    // are released. For now, we try to provide some upward compatibility
    // so that future versions of Nav and IE will show they are at
    // *least* JS 1.x capable. Always check for JS version compatibility
    // with > or >=.

    else if (is_nav && (is_major > 5)) is_js = 1.4;
    else if (is_ie && (is_major > 5)) is_js = 1.3;
    else if (is_moz) is_js = 1.5;
    else if (is_fb||is_fx) is_js = 1.5; // 032504 - dmr
    
    // what about ie6 and ie6up for js version? abk
    
    // HACK: no idea for other browsers; always check for JS version 
    // with > or >=
    else is_js = 0.0;
    // HACK FOR IE5 MAC = js vers = 1.4 (if put inside if/else jumps out at 1.3)
    if ((agt.indexOf("mac")!=-1) && is_ie5up) is_js = 1.4; // 020128 - abk
    
    // Done with is_minor testing; revert to real for N6/7
    if (is_nav6up) {
       is_minor = navigator.vendorSub;
    }

    // *** PLATFORM ***
    var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
    // NOTE: On Opera 3.0, the userAgent string includes "Windows 95/NT4" on all
    //        Win32, so you can't distinguish between Win95 and WinNT.
    var is_win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows 95")!=-1));

    // is this a 16 bit compiled version?
    var is_win16 = ((agt.indexOf("win16")!=-1) ||
               (agt.indexOf("16bit")!=-1) || (agt.indexOf("windows 3.1")!=-1) ||
               (agt.indexOf("windows 16-bit")!=-1) );

    var is_win31 = ((agt.indexOf("windows 3.1")!=-1) || (agt.indexOf("win16")!=-1) ||
                    (agt.indexOf("windows 16-bit")!=-1));
	
	var is_winme = ((agt.indexOf("win 9x 4.90")!=-1));    // new 020128 - abk
    var is_win2k = ((agt.indexOf("windows nt 5.0")!=-1) || (agt.indexOf("windows 2000")!=-1)); // 020214 - dmr
    var is_winxp = ((agt.indexOf("windows nt 5.1")!=-1) || (agt.indexOf("windows xp")!=-1)); // 020214 - dmr

    // NOTE: Reliable detection of Win98 may not be possible. It appears that:
    //       - On Nav 4.x and before you'll get plain "Windows" in userAgent.
    //       - On Mercury client, the 32-bit version will return "Win98", but
    //         the 16-bit version running on Win98 will still return "Win95".
    var is_win98 = ((agt.indexOf("win98")!=-1) || (agt.indexOf("windows 98")!=-1));
    var is_winnt = ((agt.indexOf("winnt")!=-1) || (agt.indexOf("windows nt")!=-1));
    var is_win32 = (is_win95 || is_winnt || is_win98 ||
                    ((is_major >= 4) && (navigator.platform == "Win32")) ||
                    (agt.indexOf("win32")!=-1) || (agt.indexOf("32bit")!=-1));

    var is_os2   = ((agt.indexOf("os/2")!=-1) ||
                    (navigator.appVersion.indexOf("OS/2")!=-1) ||
                    (agt.indexOf("ibm-webexplorer")!=-1));

    var is_mac    = (agt.indexOf("mac")!=-1);
    if (is_mac) { is_win = !is_mac; } // dmr - 06/20/2002
    var is_mac68k = (is_mac && ((agt.indexOf("68k")!=-1) ||
                               (agt.indexOf("68000")!=-1)));
    var is_macppc = (is_mac && ((agt.indexOf("ppc")!=-1) ||
                                (agt.indexOf("powerpc")!=-1)));
    var is_macosx = (is_mac && (agt.indexOf("os x")!=-1));

    var is_sun   = (agt.indexOf("sunos")!=-1);
    var is_sun4  = (agt.indexOf("sunos 4")!=-1);
    var is_sun5  = (agt.indexOf("sunos 5")!=-1);
    var is_suni86= (is_sun && (agt.indexOf("i86")!=-1));
    var is_irix  = (agt.indexOf("irix") !=-1);    // SGI
    var is_irix5 = (agt.indexOf("irix 5") !=-1);
    var is_irix6 = ((agt.indexOf("irix 6") !=-1) || (agt.indexOf("irix6") !=-1));
    var is_hpux  = (agt.indexOf("hp-ux")!=-1);
    var is_hpux9 = (is_hpux && (agt.indexOf("09.")!=-1));
    var is_hpux10= (is_hpux && (agt.indexOf("10.")!=-1));
    var is_aix   = (agt.indexOf("aix") !=-1);      // IBM
    var is_aix1  = (agt.indexOf("aix 1") !=-1);
    var is_aix2  = (agt.indexOf("aix 2") !=-1);
    var is_aix3  = (agt.indexOf("aix 3") !=-1);
    var is_aix4  = (agt.indexOf("aix 4") !=-1);
    var is_linux = (agt.indexOf("inux")!=-1);
    var is_sco   = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);
    var is_unixware = (agt.indexOf("unix_system_v")!=-1);
    var is_mpras    = (agt.indexOf("ncr")!=-1);
    var is_reliant  = (agt.indexOf("reliantunix")!=-1);
    var is_dec   = ((agt.indexOf("dec")!=-1) || (agt.indexOf("osf1")!=-1) ||
           (agt.indexOf("dec_alpha")!=-1) || (agt.indexOf("alphaserver")!=-1) ||
           (agt.indexOf("ultrix")!=-1) || (agt.indexOf("alphastation")!=-1));
    var is_sinix = (agt.indexOf("sinix")!=-1);
    var is_freebsd = (agt.indexOf("freebsd")!=-1);
    var is_bsd = (agt.indexOf("bsd")!=-1);
    var is_unix  = ((agt.indexOf("x11")!=-1) || is_sun || is_irix || is_hpux ||
                 is_sco ||is_unixware || is_mpras || is_reliant ||
                 is_dec || is_sinix || is_aix || is_linux || is_bsd || is_freebsd);

    var is_vms   = ((agt.indexOf("vax")!=-1) || (agt.indexOf("openvms")!=-1));
// additional checks, abk
	var is_anchors = (document.anchors) ? "true":"false";
	var is_regexp = (window.RegExp) ? "true":"false";
	var is_option = (window.Option) ? "true":"false";
	var is_all = (document.all) ? "true":"false";
// cookies - 990624 - abk
	document.cookie = "cookies=true";
	var is_cookie = (document.cookie) ? "true" : "false";
	var is_images = (document.images) ? "true":"false";
	var is_layers = (document.layers) ? "true":"false"; // gecko m7 bug?
// new doc obj tests 990624-abk
	var is_forms = (document.forms) ? "true" : "false";
	var is_links = (document.links) ? "true" : "false";
	var is_frames = (window.frames) ? "true" : "false";
	var is_screen = (window.screen) ? "true" : "false";

// java
	var is_java = (navigator.javaEnabled());

// Flash checking code adapted from Doc JavaScript information; 
// see http://webref.com/js/column84/2.html

   var is_Flash        = false;
   var is_FlashVersion = 0;

   if ((is_nav||is_opera||is_moz||is_fb||is_fx||is_safari)||
       (is_mac&&is_ie5up)) {
      var plugin = (navigator.mimeTypes && 
                    navigator.mimeTypes["application/x-shockwave-flash"] &&
                    navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin) ?
                    navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin : 0;
//      if (plugin) {
      if (plugin&&plugin.description) {
         is_Flash = true;
         is_FlashVersion = parseInt(plugin.description.substring(plugin.description.indexOf(".")-1));
      }
   }

   if (is_win&&is_ie4up)
   { // writes HTML <script> into <head> right after this Javascript is run
      document.write(
         '<scr' + 'ipt language=VBScript>' + '\n' +
         'Dim hasPlayer, playerversion' + '\n' +
         'hasPlayer = false' + '\n' +
         'playerversion = 10' + '\n' +
         'Do While playerversion > 0' + '\n' +
            'On Error Resume Next' + '\n' +
            'hasPlayer = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash." & playerversion)))' + '\n' +
            'If hasPlayer = true Then Exit Do' + '\n' +
            'playerversion = playerversion - 1' + '\n' +
         'Loop' + '\n' +
         'is_FlashVersion = playerversion' + '\n' +
         'is_Flash = hasPlayer' + '\n' +
         '<\/sc' + 'ript>'
      );
   }