var issend = 0;
    
//解决回调函数中，this引用无效的问题
this.bind = function(instance, method)
{
    return function()
    {
	    method.apply(instance, arguments);
    }
}
this.ReturnSend = function(req)//用户投票回调函数
{
    issend = 0;
    if(req.responseText == "")
    {
        $("#mes").html('用户名密码有误,请重新输入');
        return;
    }
    var url = window.location.toString();
    url = url.toLowerCase();
    url = url.replace("#","");
    var paras = url.split("?");
    if(paras.length == 2)
    {
        var params = paras[1].split('&');
        for(i=0; i< params.length;i++)
        {
            if(params[i].indexOf("url=") >= 0)
            {
               location.href=unescape(params[i].replace("url=",""));
            }
        }
    }
    else
    {
        location.href = location.href;
    }
}

this.UserLogin = function()
{

    if($("#txbUserName").val() == "")
    {
        $("#mes").html('请填写用户名');
        return;
    }
    if($("#txbPwd").val() == "")
    {
        $("#mes").html('请填写密码');
        return;
    }
    if(issend == 1)
    {
        $("#mes").html('登录中……请稍候……');
        return;
    }
    issend=1;
    Request.sendPOST("/AjaxLogin.aspx", "d="+new Date+"&n=1&un="+escape($("#txbUserName").val())+"&pw="+escape($("#txbPwd").val()),
    this.bind(this, this.ReturnSend), null, null); 
}