function show(id) {
	var ids = ["ProductList", "ProjectList"];
	for(var i = 0; i < ids.length; i++) {
		var elem = document.getElementById(ids[i]);
		if(ids[i] == id && elem.style.display != "block") {
			elem.style.display = "block";
		} else {
			elem.style.display = "none";
		}
	}
}