// Script by Thomas Stich
// http://www.stichpunkt.de/beitrag/popup.html
// use it if you like it
//
// modified by Robert Becker

var pop = null;

function popdown() {
    if (pop && !pop.closed) pop.close();
}

function popup(obj,w,h) {
    return popup(obj, w, h, "");
}

function popup(obj,w,h,arg) {
    var url = (obj.getAttribute) ? obj.getAttribute('href') : obj.href;
    if (!url) return true;
    w = (w) ? w += 20 : 150;  // 150px*150px is the default size
    h = (h) ? h += 25 : 150;
    var args = 'width='+w+',height='+h+',resizable'+arg;
    popdown();
    pop = window.open(url,'',args);
    return (pop) ? false : true;
}

function scrollablePopup(obj,w,h) {
    return popup(obj, w, h, ",scrollbars");
}

window.onunload = popdown;
window.onfocus = popdown;