function zoom(link, wName, w, h, scroll) {
	var clientHt = window.screen.height;
	var clientWt = window.screen.width;
	newWin = window.open(link, wName, 'scrollbars='+scroll+', resizable=yes, width='+w+', height='+h+', location=no, toolbar=no, menubar=no, status=yes');
	newWin.moveTo( (clientWt/2)-(w/2) , (clientHt/2)-(h/2) );
	newWin.resizeTo(w,h);
}