function wopen(url, w, h)
{
	leftPos = 0
	topPos = 0
	
	if (screen) {
		leftPos = (screen.width - w) / 2 - 10;
        topPos = (screen.height - h) / 2;
	}	
	w += 10;
    h += 60;
	
    var win = window.open(url,
		'popup', 
		'left='+leftPos+',top='+topPos+',width=' + w + ', height=' + h + ', ' +
		'location=no, menubar=no, ' +
		'status=no, toolbar=no, scrollbars=no, resizable=no');
	win.resizeTo(w, h);
	win.focus();
}