var InternetExplorer = navigator.appName.indexOf("Microsoft") != -1;

function openCenter(url, name, feat, w, h)
{
if (document.all)
{
ScreenX = document.body.scrollWidth;
ScreenY = top.document.body.clientHeight;
}
else
{
var ScreenX = top.innerWidth - 16;
var ScreenY = top.innerHeight - 16;
}

window.open(url, name, "width=" + w + ",height=" + h + ",left=10,top=10," + feat);
}