function swapImages(img_name, img_src){
	if (document.images){
		document[img_name].src = img_src;
    }
}
function returnImgLoc(name, extension){
	for(i=0;i<navTopLength;i++){
		if(name.slice(0,3)==navTopArray[i].slice(0,3)){
			var nameLeng=name.length;
			var tempNum=name.slice(nameLeng-1,nameLeng);
			var imgLoc='images/nav/subs/'+navSubArray[i][name.slice(nameLeng-1,nameLeng)-1]+''+extension+'.gif';
		}
	}
	return imgLoc;
}
function showSub(name){
	menuOver();
	if(openedSubNav!=name){
		openedSubNav=name;
		for(i=0;i<navSubLength;i++){
			if(name==navSubArray[i]){
				document.getElementById(navSubArray[i]).style.visibility = 'visible';
			}else{
				document.getElementById(navSubArray[i]).style.visibility = 'hidden';
			}
		}
	}
}
function hideSubs(){
	showSub("none")
}
function openPopup(name, height, width){
	var winl = (screen.width - width) / 2;
	var wint = (screen.height - height) / 2;
	var windowName = name.slice(name.indexOf('-')+1, 50);
	var windowLoc = ''+name+'.html';
	var winProps = 'toolbar=no,statusbar=no,location=no,scrollbars=no,resizable=yes,width='+width+',height='+height+',top='+wint+',left='+winl;
	window.open(windowLoc, windowName, winProps);
}
function getQueryVariable(variable) {
  	var query = window.location.search.substring(1);
  	var vars = query.split("&");
  	for (var i=0;i<vars.length;i++) {
 		var pair = vars[i].split("=");
   		if (pair[0] == variable) {
      		return pair[1];
		}
	}
}
function includeFlash(movieName, width, height, bgcolor, vars){
	var nocache=new Date().getTime();
	if(vars){
		urlvars=("?randomImage="+vars+"&nc="+nocache);
	}else{
		urlvars=("?nc="+nocache);
	}
	document.write ('<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" '
		+'codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" WIDTH="'+width+'" HEIGHT="'+height+'" id='+movieName+' ALIGN="">'
		+'<PARAM NAME=movie VALUE="'+movieName+'.swf'+urlvars+'"><PARAM NAME=FlashVars VALUE="movieid='+nocache+'" />'
		+'<PARAM NAME=salign VALUE="LT"><PARAM NAME=quality VALUE=high><PARAM NAME=scale VALUE=noscale><PARAM NAME=bgcolor VALUE='+bgcolor+'>'
		+'<EMBED src="'+movieName+'.swf'+urlvars+'" ' 
		+'FlashVars="movieid='+nocache+'" quality=high scale=noscale bgcolor='+bgcolor+'  WIDTH="'+width+'" HEIGHT="'+height+'" NAME='+movieName+' SALIGN="LT"'
		+'TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"></EMBED></OBJECT>')
}
/**********************************************************************
 section 1 - below is an array of sections used in the navigation
 **********************************************************************/
navTopArray=["about","tech","prod","invst","news","career","contact"];
navSubArray=["prodSub2","prodSub3"];
navTopLength=navTopArray.length;
navSubLength=navSubArray.length;
/**********************************************************************
 section 2 - below shows and hides navigation layers
 **********************************************************************/
function show(id){
	menuOver();
	if(window.openedNav){
	if(id!=openedNav){
		if (id == "none") openedNav="none"
		for(i=0;i<navTopLength;i++){
			var topDivName = "nav"+(i+1);
			var subDivName = navTopArray[i]+"Sub";
			if(id==navTopArray[i]){
				openedNav=navTopArray[i];
				document.getElementById(subDivName).style.visibility = 'visible';
				document.getElementById(topDivName).className = topDivName;
			}else{
				document.getElementById(subDivName).style.visibility = 'hidden';
				document.getElementById(topDivName).className = 'topNav';
			}
		}
	}
	}
	hideSubs();
}
function hideAll(){
	show(pageSelected);
	if(window.navItem2)showSub(pageSelected+"Sub"+navItem);
}
function menuOver(){
	if(window.clearNav){
		window.clearTimeout(clearNav);
	}
}
function menuRevert(){
	clearNav = window.setTimeout("hideAll()", 1500);
}
/**********************************************************************
 section 5 - below are the functions called on page load (content area)
 **********************************************************************/
function init() {
	if(window.navItem2 && window.navItem2!="none"){
		document.getElementById(pageSelected+''+navItem+'-'+navItem2).className = (navItem2==1)?'navSelectLeft':'navSelect';
	}else if(window.navItem){
		document.getElementById(pageSelected+''+navItem).className = (navItem==1)?'navSelectLeft':'navSelect';
	}
	if(window.newscheck){setNewsPage();}
	hideAll();
}
openedNav="none";
openedSubNav="none";
/**********************************************************************
 section 6 - Email update form validation
 **********************************************************************/
function validateEmailUpdate() {
	error_string="";				
	if (document.emailupdate.email.value==""){
		error_string = "An email address.\n" + error_string;
		document.emailupdate.email.focus();
	} else if (document.emailupdate.email.value.indexOf("@")==-1 || document.emailupdate.email.value.indexOf(".")==-1){
		error_string = "A valid email address.\n" + error_string;
		alert("Please provide a valid email address.");
		document.emailupdate.email.focus();
		return false;
	}
	if (document.emailupdate.name.value==""){
		error_string = "A name.\n" + error_string;
		document.emailupdate.name.focus();
	}
    if (error_string!=""){
		error_string = "The following must be provided: \n\n" + error_string;
		alert(error_string);
		return false;
 	}else{
		return true;
	}
}
/**********************************************************************
 section 7 - This determines what news section the user is in and changes the style to match
 **********************************************************************/
function setNewsPage(){
	var varLoc = document.cookie.indexOf("section")+8;
	if(document.cookie.slice(varLoc, varLoc+3)=='inv'){
		document.getElementById('copyArea').className="invstCopy";
		pageSelected='invst'; //this tells the navigation which page is selected
		navItem=1; //this tells the sub navigation which item should be selected
		swapImages('imgA', 'images/topImgs/img4A.jpg');
		swapImages('imgB', 'images/topImgs/img4B.gif');
	}else{
		document.getElementById('copyArea').className="newsCopy";
		pageSelected='news'; //this tells the navigation which page is selected
		navItem=1; //this tells the sub navigation which item should be selected
		swapImages('imgA', 'images/topImgs/img5A.jpg');
		swapImages('imgB', 'images/topImgs/img5B.gif');
	}
}