function newImage(arg) {
		if (document.images) {
			rslt = new Image();
			rslt.src = arg;
			return rslt;
		}
	}


	//rollover code

	//new mouse over script
	if (navigator.appVersion.indexOf("2.") != -1){
	        check = false;
	        }
	if ((navigator.appVersion.indexOf("3.") != -1) && (navigator.appName.indexOf("Explorer") != -1)){
	        check = false;
	        }
	else {
	        check = true;
	        }
	if (check == true){
	        
	        
	    //main menu
		var imgAbout = newImage("/images/nav/about_off.gif");
		var imgAboutover = newImage("/images/nav/about_over.gif");

		var imgCurr = newImage("/images/nav/curr_off.gif");
		var imgCurrover = newImage("/images/nav/curr_over.gif");

		var imgPast = newImage("/images/nav/past_off.gif");
		var imgPastover = newImage("/images/nav/past_over.gif");

		var imgHow = newImage("/images/nav/how_off.gif");
		var imgHowover = newImage("/images/nav/how_over.gif");

		var imgSignup = newImage("/images/nav/signup_off.gif");
		var imgSignupover = newImage("/images/nav/signup_over.gif");

		var imgContact = newImage("/images/nav/contact_off.gif");
		var imgContactover = newImage("/images/nav/contact_over.gif");

		var imgResearch = newImage("/images/nav/research_off.gif");
		var imgResearchover = newImage("/images/nav/research_over.gif");

		
			
			
	}



	function over(name){
		if (check == true) {document[name].src = eval(name + "over.src"); }
	}

	function off(name){
		if (check == true) {document[name].src = eval(name + ".src"); }
	}