function check(login, start)
{
	try
	{
		if (start)
		{
			login.yhm.select();
			login.yhm.focus();
			return;
		}
		else
		{
			var msg = $("msg");
			msg.innerHTML = " ";
		}
		if(login.yhm.value.length==0)
		{
			login.yhm.focus();
		}
		else if(login.mm.value.length==0)
		{
			login.mm.focus();
		}
		else
		{
			var argument = new Array("yhm", login.yhm.value, "mm", login.mm.value);
			postRequest("login.jsp", argument, successLogin, exception);
		}
	}
	catch(e)
	{
		alert("ÔËÐдíÎó£º" + e.name + "£¬" + e.message);
	}
	return false;
}

function successLogin(result)
{
	finishProcess();
	document.location = result.getAttribute("redirect");
}

function exception(info)
{
	finishProcess();
	var errorMsgElement = $("msg");
	errorMsgElement.innerHTML = info;
	var login = document.forms[0];
	login.yhm.select();
	login.mm.select() ;
	login.mm.focus();
}