var pop = null;
function popdown() {
if (pop && !pop.closed) pop.close();
}
function bewpopup(obj,w,h) {
var url = (obj.getAttribute) ? obj.getAttribute('href') : obj.href;
if (!url) return true;
w = (w) ? w += 20 : 590;
h = (h) ? h += 25 : 540;
var dgr = 'width='+w+',height='+h+',resizable,scrollbars';
popdown();
pop = window.open(url,'',dgr);
return (pop) ? false : true;
}
window.onunload = popdown;
window.onfocus = popdown;