function switchListing(objID){
	try{
	var quality = document.getElementById("quality");
	var safety = document.getElementById("safety");
	var enviro = document.getElementById("enviro");
	
	var obj = document.getElementById(objID);
	
	quality.style.visibility = "hidden";
	quality.style.display = "none";	

	safety.style.visibility = "hidden";
	safety.style.display = "none";		

	enviro.style.visibility = "hidden";	
	enviro.style.display = "none";	

	
	obj.style.visibility = "visible";	
	obj.style.display = "block";	
	}catch(e){
		quality.style.visibility = "visible";	
		quality.style.display = "block";			
	}
}