function check_login(url,from)
{
	var allurl=url+"/login/loginHTML?t="+Math.random();
	var data={'from':from};
	$.get(
	   allurl,
	   data,
	   function(msg){
	   	  //alert(msg);
	      $('#login_box').html(msg);
	   }
	);
}
function logout(url)
{
   var allurl="http://member.tongyi.com/index.php/login/logout/";
   var data={"form":url};
   $.get(
	   allurl,
	   data
   );
}