function checkRequiredFields() {
		var elms = document.getElementsByTagName("INPUT");
		for (var i=0; i<elms.length; i++) {
			var elm = elms[i];
			if (elm.required=="true" && elm.value=="") { 
				alert("Required field \"" + elm.name +"\" is empty; please try again.");
				return false;
			}
		}
		return true;
	}