// JavaScript Document
// preload navigation images:
function preloadImages() {
	
	about_on.src = "/images/nav/about_on.gif";
	about_off.src = "/images/nav/about_off.gif";

	projects_on.src = "/images/nav/projects_on.gif";
	projects_off.src = "/images/nav/projects_off.gif";
	
	fellowships_on.src = "/images/nav/fellowships_on.gif";
	fellowships_off.src = "/images/nav/fellowships_off.gif";
	
	publications_on.src = "/images/nav/publications_on.gif";
	publications_off.src = "/images/nav/publications_off.gif";
	
	en_on.src = "/images/nav/en_on.gif";
	en_off.src = "/images/nav/en_off.gif";
	
	jshp_over.src = "/images/nav/rtnav/hp/jshp_over.jpg";
	jshp_off.src = "/images/nav/rtnav/hp/jshp_off.jpg";
	
	hthp_over.src = "/images/nav/rtnav/hp/hthp_over.jpg";
	hthp_off.src = "/images/nav/rtnav/hp/hthp_off.jpg";

	cphp_over.src = "/images/nav/rtnav/hp/cphp_over.jpg";
	cphp_off.src = "/images/nav/rtnav/hp/cphp_off.jpg";

   	jssub_on.src = "/images/nav/rtnav/sub/jssub_on.jpg";
   	jssub_off.src = "/images/nav/rtnav/sub/jssub_off.jpg";
   
   	htsub_on.src = "/images/nav/rtnav/sub/htsub_on.jpg";
   	htsub_off.src = "/images/nav/rtnav/sub/htsub_off.jpg";
      
   	cpsub_over.src = "/images/nav/rtnav/sub/cpsub_over.jpg";
   	cpsub_off.src = "/images/nav/rtnav/sub/cpsub_off.jpg";

}

	if (document.images) {
   
   about_on = new Image();
   about_on.src = "/images/nav/about_on.gif";
   about_off = new Image();
   about_off.src = "/images/nav/about_off.gif"
   
   projects_on = new Image();
   projects_on.src = "/images/nav/projects_on.gif";
   projects_off = new Image();
   projects_off.src = "/images/nav/projects_off.gif"
   
   fellowships_on = new Image();
   fellowships_on.src = "/images/nav/fellowships_on.gif";
   fellowships_off = new Image();
   fellowships_off.src = "/images/nav/fellowships_off.gif"
   
   publications_on = new Image();
   publications_on.src = "/images/nav/publications_on.gif";
   publications_off = new Image();
   publications_off.src = "/images/nav/publications_off.gif"
   
   en_on = new Image();
   en_on.src = "/images/nav/en_on.gif";
   en_off = new Image();
   en_off.src = "/images/nav/en_off.gif"
   
   jshp_over = new Image();
   jshp_over.src = "/images/nav/rtnav/hp/jshp_over.jpg";
   jshp_off = new Image();
   jshp_off.src = "/images/nav/rtnav/hp/jshp_off.jpg";
   
   hthp_over = new Image();
   hthp_over.src = "/images/nav/rtnav/hp/hthp_over.jpg";
   hthp_off = new Image();
   hthp_off.src = "/images/nav/rtnav/hp/hthp_off.jpg";
      
   cphp_over = new Image();
   cphp_over.src = "/images/nav/rtnav/hp/cphp_over.jpg";
   cphp_off = new Image();
   cphp_off.src = "/images/nav/rtnav/hp/cphp_off.jpg";
   
   jssub_on = new Image();
   jssub_on.src = "/images/nav/rtnav/sub/jssub_on.jpg";
   jssub_off = new Image();
   jssub_off.src = "/images/nav/rtnav/sub/jssub_off.jpg";
   
   htsub_on = new Image();
   htsub_on.src = "/images/nav/rtnav/sub/htsub_on.jpg";
   htsub_off = new Image();
   htsub_off.src = "/images/nav/rtnav/sub/htsub_off.jpg";
      
   cpsub_over = new Image();
   cpsub_over.src = "/images/nav/rtnav/sub/cpsub_over.jpg";
   cpsub_off = new Image();
   cpsub_off.src = "/images/nav/rtnav/sub/cpsub_off.jpg";

} 


function swapImage(imgName,newImage) {
   if (document.images) {
      eval('document.' + imgName + '.src = ' + newImage + '.src');
   }
}


function init(){

isNS4 = (document.layers) ? true : false;
isIE4 = (document.all && !document.getElementById) ? true : false;
isIE5 = (document.all && document.getElementById) ? true : false;
isNS6 = (!document.all && document.getElementById) ? true : false;

	
		if (isNS4){
		   layerRef = "document.layers";
		   styleSwitch="";
		}
		else if (isIE4) {
		   layerRef = "document.all";
		   styleSwitch=".style";
		}
		else if (isIE5 || isNS6) {
		   layerRef = "document.getElementById";
		   styleSwitch=".style";
		}		

		//wipeLeft('loadingBG');
		//hideLayer('header');
		//hideLayer('msg');
temp=0;
	}


//GENERAL FUNCTIONS
	function showLayer(layerName){

		clearTimeout(temp);

		var a = showLayer.arguments;
		for (i=0; i<a.length; i++) {
		
		//alert(layerRef+'("'+a[i]+'")'+'.style.visibility="visible"');
			if (isIE5 || isNS6) {
	   		eval(layerRef+'("'+a[i]+'")'+styleSwitch+'.visibility="visible"');
			}else{
			eval(layerRef+'["'+a[i]+'"]'+styleSwitch+'.visibility="visible"');
			}
		}

		temp=setTimeout('hideLayer("'+layerName+'")',3000);
	}
	

	function hideLayer(){
		var a = hideLayer.arguments;
		//alert(hideLayer.arguments);
  		for (i=0; i<a.length; i++) {
    	//alert(a[i]);
			if (isIE5 || isNS6) {
	   		eval(layerRef+'("'+a[i]+'")'+styleSwitch+'.visibility="hidden"');
			} else{
			eval(layerRef+'["'+a[i]+'"]'+styleSwitch+'.visibility="hidden"');
			}
		}
	}