function loginsubmitverify(){
	if (!$("#username").val()){alert('用户名不能为空！'); $("#username").focus(); return false;}
	if (!$("#password").val()){alert('密码不能为空！'); $("#password").focus(); return false;}
	
	$("#loginsubmit").attr({"disabled":"disabled"});
	
	$.post("batch.login.php",{username:$("#username").val(),password:$("#password").val(),cookietime:$("#cookietime").attr("checked"),fresh:Math.random()}, function(data){	
		$("#login").html(data); 		
	}); 
		
}

function logout(){
	
	$.post("logout.php", function(data){	
		$("#login").html(data); 		
	}); 
	
	return false;	
}