function check()
{
    if (login.uname.value=="") 
		alert("请输入用户名！");
	else if (login.pwd.value=="") 
		alert("请输入登录密码！");
	else
		login.submit();
}
function s_check()
{
    if (search.stype.value=="") 
		alert("请选择搜索类别！");
   
	else
		search.submit();
}