function switchid(id){
	hideallids();
	showdiv(id);
}

function hideallids(){
	for (var i=1;i<100;i++){
		hidediv("ref"+i);
	}		  
}

function hidediv(id) {
	//safe function to hide an element with a specified id
	if (document.getElementById) { // DOM3 = IE5, NS6
		if(document.getElementById(id)) {
			document.getElementById(id).style.display = 'none';
		}
	}
	else {
		if (document.layers) { // Netscape 4
			if(document.id) {
				document.id.display = 'none';
			}
		}
		else { // IE 4
			if(document.all.id) {
				document.all.id.style.display = 'none';
			}
		}
	}
}

function showdiv(id) {
	//safe function to show an element with a specified id
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById(id).style.display = 'block';
	}
	else {
		if (document.layers) { // Netscape 4
			document.id.display = 'block';
		}
		else { // IE 4
			document.all.id.style.display = 'block';
		}
	}
}