document.writeln("<div id=\"pop\" class=\"pop\" style=\"display:none\"> ");
document.writeln("	<div class=\"pop_head\"><a href=\"javascript:void(0);\" onclick=\"hide(\'pop\')\">关闭<\/a><\/div> ");
document.writeln("	<div class=\"pop_body\"> <iframe src=\"\/User\/Register.aspx\" scrolling=\"no\" name=\"xvna_login\" style=\"width:100%; height:140px;\" frameborder=\"0\"><\/iframe> <\/div> ");
document.writeln("<\/div>");

document.writeln("<span style=\"display:none;\" id=\"xvna_users2\">");
document.writeln("	<a href=\"javascript:void(0);\" onclick=\"show(\'pop\')\">登录<\/a> -");
document.writeln("	<a target=\"_blank\" href=\"http:\/\/ncs.xvna.com\/register.php\">注册<\/a>");
document.writeln("<\/span>")

function show(o){
var o = document.getElementById(o);
o.style.left=(document.body.clientWidth-300)/2+document.documentElement.scrollLeft + "px";  //(屏幕可见宽度 - 浮动框宽度) / 2 + 滚动条宽度
o.style.top=(document.body.clientHeight-150)/2+document.documentElement.scrollTop/2 + "px";  //(屏幕可见高度 - 浮动框高度) / 2 + 滚动条高度
o.style.display = "";
} 
function hide(o){
var o = document.getElementById(o); 
o.style.display = "none";
}