//验证登录
function CheckLogin()
{
    if(document.getElementById("liUserName").childNodes[0].value=="")
    {
        alert('用户名不能为空！'); 
        document.getElementById("liUserName").childNodes[0].focus();
        return false;
    }
    if(document.getElementById("liPassword").childNodes[0].value=="")
    {
        alert('密码不能为空！'); 
        document.getElementById("liPassword").childNodes[0].focus();
        return false;
    }
}

function ShowRegDiv()
{ 
    document.body.innerHTML+="<div id=\"divRegPar\" style=\"display:none;z-index:99;position:absolute; left:0px; top:0px; filter:alpha(opacity=60); /* IE */ -moz-opacity:1.0; /* Moz + FF */ opacity: 1.0; background:#ccc;\"></div>";

    document.getElementById("divRegPar").style.height=document.body.scrollHeight;
    document.getElementById("divRegPar").style.width=document.documentElement.clientWidth;
    document.getElementById("divRegPar").style.display="block";
    
    document.body.innerHTML+="<div id=\"divRegSon\" style=\"z-index:100;position:absolute;display:none; height:294px; width:650px;\"><iframe src=\"/User/Reg.aspx\" height=\"294\" width=\"650\" frameborder=\"0\" scrolling=\"no\"></iframe></div>";

    document.getElementById("divRegSon").style.top=(document.documentElement.clientHeight-280)/2
    document.getElementById("divRegSon").style.left=(document.documentElement.clientWidth-600)/2;
    document.getElementById("divRegSon").style.display="block";
}