function SearchRet(){
			var keywrods=document.getElementById("keywrods");
			if(keywrods.value==""||keywrods.value=="请输入你想查询的关键字"){
				alert("请输入关键字");
				keywrods.value="";
				keywrods.style.color='';
				keywrods.focus();
				return false;
			}
			window.open("http://so.ppneed.com/?"+escape(keywrods.value));
		}