// rollover image function
function changeImage(image_name,image_src) {
   	document.images[image_name].src = image_src;
}

// preload images
function preloadImages(){
	
	if (document.images){
	
		var nav_home_over = new Image(70,27);
		nav_home_over.src = "homeblue.gif";
		
		var nav_about_over = new Image(86,27);
		nav_about_over.src = "aboutusblue.gif";
		
		var nav_programs_over = new Image(100,27);
		nav_programs_over.src = "programsblue.gif";
		
		var nav_achievements_over = new Image(115,27);
		nav_achievements_over.src = "achievementsblue.gif";
		
		var nav_contributions_over = new Image(123,27);
		nav_contributions_over.src = "contributionsblue.gif";
		
		var nav_alumni_over = new Image(77,27);
		nav_alumni_over.src = "alumniblue.gif";
		
		var nav_news_over = new Image(66,27);
		nav_news_over.src = "newsblue.gif";
		
		var nav_contactus_over = new Image(98,27);
		nav_contactus_over.src = "contactusblue.gif";
		
	} else {
		return;
	}
	
}

// event handler used for the navigation rollovers
sfHover = function(){
	var sfEls = document.getElementById("nav").getElementsByTagName("li");
	for (var i = 0; i < sfEls.length; i++){
		sfEls[i].onmouseover = function(){
			this.className += " sfhover";
			//document.getElementById("ultralingua").style.visibility = "hidden";
		}
		sfEls[i].onmouseout = function(){
			this.className = this.className.replace(new RegExp(" sfhover\\b"), "");
			//document.getElementById("ultralingua").style.visibility = "visible";
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);
//if (window.attachEvent) window.attachEvent("onload", sfHover1);