browserName = navigator.appName;   // detect browser 
         browserVer = parseInt(navigator.appVersion);
             if (browserName == "Netscape" && browserVer >= 3) browserVer = "1";
		 else if (browserName == "Microsoft Internet Explorer" && browserVer == 4) browserVer = "1";
             else browserVer = "2";

//preload images:
if (browserVer == 1) {
	main = new Image(217,217);
	main.src = "images/centerimg_home.jpg";
 
   overview = new Image(217,217);
   overview.src = "images/centerimg_overview.jpg";
	
	bio = new Image(217,217);
    bio.src = "images/centerimg_bioenergy.jpg";
    
    	solutions = new Image(217,217);
    solutions.src = "images/centerimg_solutions.jpg";
    
    people = new Image(217,217);
    people.src = "images/centerimg_people.jpg";

    news = new Image(217,217);
    news.src = "images/centerimg_news.jpg";
}

function hiLite(imgDocID, imgObjName, imgDocID2, imgObjName2) {
if (browserVer == 1) {
	document.images[imgDocID].src = eval(imgObjName + ".src");
	
}}