String.prototype.trim = function() 
		{ 
			return this.replace(/(^[\s]*)|([\s]*$)/g, ""); 
		} 
		function $(objectId){
			return document.getElementById(objectId);
		}
		function canNotEmpty(idList, lableList){
			var l1 = idList.split(","); var l2 = lableList.split(",");
			for (var i=0; i<l1.length; i++){
				if ($(l1[i]).value.trim() == ""){alert(l2[i]+"不能为空！");	$(l1[i]).focus(); return false; break; }
			}
		}
		function leastOneNotEmpty(idList){
			var flag = false;
			var l1 = idList.split(",");
			for (var i=0; i<l1.length; i++){
				if ($(l1[i]).value.trim() != ""){ flag = true; break; }
			}
			if (!flag) alert("至少填写一项!");
			return flag;
		}
		function dataCheck(idList, lableList){			
			if (lableList != null)	return canNotEmpty(idList, lableList);
			else   return leastOneNotEmpty(idList);
		}