var version = "x";
var browserName = navigator.appName;
var browserVer = parseInt(navigator.appVersion);
if (browserName == "Netscape" && browserVer >= 3) version = "ok";
else if (browserName == "Microsoft Internet Explorer" && browserVer >= 3) version = "ok";

if (version == "ok") {
             SOM0on = new Image(); SOM0on.src = "buttons/OPT01on.gif";
             SOM0off = new Image(); SOM0off.src = "buttons/OPT01.gif";
             SOM1on = new Image(); SOM1on.src = "buttons/OPT10on.gif";
             SOM1off = new Image(); SOM1off.src = "buttons/OPT10.gif";
             SOM2on = new Image(); SOM2on.src = "buttons/OPT03on.gif";
             SOM2off = new Image(); SOM2off.src = "buttons/OPT03.gif";
             SOM6on = new Image(); SOM6on.src = "buttons/OPT07on.gif";
             SOM6off = new Image(); SOM6off.src = "buttons/OPT07.gif";
             SOM7on = new Image(); SOM7on.src = "buttons/OPT08on.gif";
             SOM7off = new Image(); SOM7off.src = "buttons/OPT08.gif";
             SOM3on = new Image(); SOM3on.src = "buttons/OPT04on.gif";
             SOM3off = new Image(); SOM3off.src = "buttons/OPT04.gif";
             SOM4on = new Image(); SOM4on.src = "buttons/OPT05on.gif";
             SOM4off = new Image(); SOM4off.src = "buttons/OPT05.gif";
             SOM13on = new Image(); SOM13on.src = "buttons/OPT14on.gif";
             SOM13off = new Image(); SOM13off.src = "buttons/OPT14.gif";
             SOM14on = new Image(); SOM14on.src = "buttons/OPT15on.gif";
             SOM14off = new Image(); SOM14off.src = "buttons/OPT15.gif";
             SOM15on = new Image(); SOM15on.src = "buttons/OPT16on.gif";
             SOM15off = new Image(); SOM15off.src = "buttons/OPT16.gif";
             SOM16on = new Image(); SOM16on.src = "buttons/OPT17on.gif";
             SOM16off = new Image(); SOM16off.src = "buttons/OPT17.gif";
             SCIon = new Image(); SCIon.src = "buttons/OPTsci2on.gif";
             SCIoff = new Image(); SCIoff.src = "buttons/OPTsci2.gif";
			CNM2on = new Image(); CNM2on.src = "buttons/OPTsom_on.gif";
			CNM2off = new Image(); CNM2off.src = "buttons/OPTsom.gif";
			CNM3on = new Image(); CNM3on.src = "buttons/OPTcomp_on.gif";
			CNM3off = new Image(); CNM3off.src = "buttons/OPTcomp.gif";
 			CNM8on = new Image(); CNM8on.src = "buttons/OPTmap_on.gif";
			CNM8off = new Image(); CNM8off.src = "buttons/OPTmap.gif";
 			CNM9on = new Image(); CNM9on.src = "buttons/OPTquestions_on.gif";
			CNM9off = new Image(); CNM9off.src = "buttons/OPTquestions.gif";
             }

function img_act (imgName) {
		if (version == "ok") {
		imgOn = eval(imgName + "on.src");
		document [imgName].src = imgOn;
		}
	}
function img_inact (imgName) {
		if (version == "ok") {
		imgOff = eval(imgName + "off.src");
		document [imgName].src = imgOff; 
		}
	}

function getYear() {
	var wd = 0
	var today = new Date()
	var thisYear = today.getYear() 
	if (thisYear <=1900) thisYear += 1900
	return(thisYear)	
	}

function redirectChild() {
	location.href = "curr.html#" + getWhen() + " target=archive";
	}

function redirect() {
	top.location.href = "#" + getWhen();
	}

function getWhen() {
	xWhen = new Array(15)
	xWhen[0] = 20090927
	xWhen[1] = 20091001
	xWhen[2] = 20091009
	xWhen[3] = 20091017
	xWhen[4] = 20091018
	xWhen[5] = 20091025
	xWhen[6] = 20091115
	xWhen[7] = 20091206
	xWhen[8] = 20100126
	xWhen[9] = 20100214
	xWhen[10] = 20100221
	xWhen[11] = 20100306
	xWhen[12] = 20100327
	xWhen[13] = 20100411
	xWhen[14] = 20100412
	xWhen[15] = 20100425

	var i = 0;
	var today = new Date()
	var day = today.getUTCDate();
	var month = today.getUTCMonth() + 1;
	if (month < 10) month = "0" + month;
	if (day < 10) day = "0" + day;
	var year = today.getYear(); 
	if (year < 1900) year = year + 1900; 
	var GMTdate = year + "" + month + "" + day; 
	for (i=0;i<15;i++) {
		if ( GMTdate <= xWhen[i] ) break;
		}
    return( i )
	}

function writeUpdate() {
	var m = document.lastModified;
	var yr = m.indexOf("200");
	var q = m.indexOf(":");
	var gmt = m.indexOf("GMT")
	var p = m.length;
	if ( yr < 7 ) return ( m.substring(0,yr+4) )
	else if ( gmt < 1) return ( m.substring(0,q-3) + ', ' + m.substring(yr,yr+4) )
	else if ( gmt > 1) return ( m.substring(0,q-3) )
	}
	
function getWindowHeight() {
	if ( navigator.userAgent.indexOf("MSIE") > 0 ) {
		var hSize = document.body.clientHeight;
		return hSize;
		} 
	else if ( navigator.userAgent.indexOf("Netscape") > 0 ) {
		var hSize = window.outerHeight;
		return hSize;
		} 
	else {                                                
		var hSize = window.outerHeight;
		return hSize ;
		}
	return;      
	}

function writeBodyDiv() {
	var content = "";
	screenheight = getWindowHeight();
	content += '<DIV id=\"layerBody\" style=\"position:absolute; width:660; height:' + (screenheight - 240);
	content += '; z-index:2; left:164; top:140; overflow:scroll; visibility: visible\">';
	document.write(content);
	}