// JavaScript Document
function sel_all(){
	var username = document.getElementById("username").value;
	var key_word = document.getElementById("key_word").value;
	if(trim(key_word)==''){
		alert("请输入要查询的内容!");
		document.getElementById("key_word").value="";
		return false;
	}
	document.getElementById("tag").value=1;
	document.search_form.submit();
}