function openWindow(url, n, w, h, xpos, ypos, hot, current) {
xpos = (screen.width-w)/2
ypos = (screen.height-h)/2
var windowprops = "scrollbars='yes',width=" + w + ",height=" + h +",left=" + xpos +",top="+ ypos;
var windowname = n
popup = window.open(url,windowname,windowprops);
popup.hot=hot
popup.current=current
}