function centerpopup(URL,width,height){ if (parseInt(navigator.appVersion) >= 3){ if (navigator.appName == "Netscape" && parseInt(navigator.appVersion)<5){ var tools = new Packages.java.awt.Toolkit.getDefaultToolkit(); screen=tools.getScreenSize(); } x = screen.width; y = screen.height; } window.open(URL,"dummy","top=" + parseInt(y/2-height/2-16) + ",left=" + parseInt(x/2-width/2-5) + ",width=" + width + ",height=" + height); }