j.extend({
    //显示窗体
    showDialog:function(loginPage){
        j.ajax({
            url:loginPage,
            beforeSend:function(xmlhttprequest){
                if(j.browser.msie && j.browser.version != '6.0')
                     j("#loginbgDiv").css({marginTop:"-135px",marginLeft:"-155px"});
                var off = j("body");
                j("#bgDiv").show().css({width:"100%",height:off.height()});
                j("#loginbgDiv").empty().show().append("<img src='/images/loading1.gif' />");
            },
            success:function(data,status){
                j("#loginbgDiv").load(loginPage);
            },
            error:function(xmlhttprequest,error){
                j("#loginbgDiv").html(error);
            }
        });
    },
    //隐藏窗体
    hideDialog:function()
    {
        j("#loginbgDiv").fadeOut();
        j("#bgDiv").fadeOut();
    }
});