function openPage (url, wwidth, wheight, title, scroll, size) {
ns4 = (document.layers)? true:false
var scrolling = ',scrollbars=' + scroll;
var sizing = ',resizable=' + size;
if (ns4) wheight = parseInt(wheight) + 30;
leftpos = (screen.width) ? (screen.width-wwidth)/2 : 0;
toppos = (screen.height) ? (screen.height-wheight)/2 : 0;
opts = 'width=' + wwidth + ',height=' + wheight + scrolling + sizing + ',top=' + toppos + ',screenY=' + toppos + ',left=' + leftpos + ',screenX=' + leftpos + ',';
popupWin = window.open(url, title, opts);
}