function clicktest(event)
{
		if(event){
			if(event.srcElement && event.srcElement.name == "refindex"){
				index.style.visibility = "visible";
				contact.style.visibility = "hidden";
				pointer.style.visibility = "hidden";
				course.style.visibility = "hidden";
				research.style.visibility = "hidden";
				intro.style.visibility = "hidden";
			}else if(event.srcElement && event.srcElement.name == "refintro"){
				index.style.visibility = "hidden";
				contact.style.visibility = "hidden";
				pointer.style.visibility = "hidden";
				course.style.visibility = "hidden";
				research.style.visibility = "hidden";
				intro.style.visibility = "visible";
			}else if(event.srcElement && event.srcElement.name == "refresearch"){
				index.style.visibility = "hidden";
				contact.style.visibility = "hidden";
				pointer.style.visibility = "hidden";
				course.style.visibility = "hidden";
				research.style.visibility = "visible";
				intro.style.visibility = "hidden";
			}else if(event.srcElement && event.srcElement.name == "refcourse"){
				index.style.visibility = "hidden";
				contact.style.visibility = "hidden";
				pointer.style.visibility = "hidden";
				course.style.visibility = "visible";
				research.style.visibility = "hidden";
				intro.style.visibility = "hidden";
			}else if(event.srcElement && event.srcElement.name == "refpointer"){
				index.style.visibility = "hidden";
				contact.style.visibility = "hidden";
				pointer.style.visibility = "visible";
				course.style.visibility = "hidden";
				research.style.visibility = "hidden";
				intro.style.visibility = "hidden";
			}else if(event.srcElement && event.srcElement.name == "refcontact"){
				index.style.visibility = "hidden";
				contact.style.visibility = "visible";
				pointer.style.visibility = "hidden";
				course.style.visibility = "hidden";
				research.style.visibility = "hidden";
				intro.style.visibility = "hidden";
			}

			if(event.target && event.target.name == "refindex"){
				document.getElementById("index").style.visibility = "visible";
				document.getElementById("contact").style.visibility = "hidden";
				document.getElementById("pointer").style.visibility = "hidden";
				document.getElementById("course").style.visibility = "hidden";
				document.getElementById("research").style.visibility = "hidden";
				document.getElementById("intro").style.visibility = "hidden";
			}else if(event.target && event.target.name == "refintro"){
				document.getElementById("index").style.visibility = "hidden";
				document.getElementById("contact").style.visibility = "hidden";
				document.getElementById("pointer").style.visibility = "hidden";
				document.getElementById("course").style.visibility = "hidden";
				document.getElementById("research").style.visibility = "hidden";
				document.getElementById("intro").style.visibility = "visible";
			}else if(event.target && event.target.name == "refresearch"){
				document.getElementById("index").style.visibility = "hidden";
				document.getElementById("contact").style.visibility = "hidden";
				document.getElementById("pointer").style.visibility = "hidden";
				document.getElementById("course").style.visibility = "hidden";
				document.getElementById("research").style.visibility = "visible";
				document.getElementById("intro").style.visibility = "hidden";
			}else if(event.target && event.target.name == "refcourse"){
				document.getElementById("index").style.visibility = "hidden";
				document.getElementById("contact").style.visibility = "hidden";
				document.getElementById("pointer").style.visibility = "hidden";
				document.getElementById("course").style.visibility = "visible";
				document.getElementById("research").style.visibility = "hidden";
				document.getElementById("intro").style.visibility = "hidden";
			}else if(event.target && event.target.name == "refpointer"){
				document.getElementById("index").style.visibility = "hidden";
				document.getElementById("contact").style.visibility = "hidden";
				document.getElementById("pointer").style.visibility = "visible";
				document.getElementById("course").style.visibility = "hidden";
				document.getElementById("research").style.visibility = "hidden";
				document.getElementById("intro").style.visibility = "hidden";
			}else if(event.target && event.target.name == "refcontact"){
				document.getElementById("index").style.visibility = "hidden";
				document.getElementById("contact").style.visibility = "visible";
				document.getElementById("pointer").style.visibility = "hidden";
				document.getElementById("course").style.visibility = "hidden";
				document.getElementById("research").style.visibility = "hidden";
				document.getElementById("intro").style.visibility = "hidden";
			}
			
		}else{
			alert("hello, world again");
		}
		return false;
}