function popup(url, width, height) {
var xposition = (0);
var yposition = (0);
window.open("popups/"+url,"","toolbar=yes, directories=no, location=no, status=yes, menubar=no, resizable=no, scrollbars=no, width=" + width + ", height=" + height + ", left="+xposition+", right="+yposition+", screenX="+xposition+", screenY="+yposition);
}