function BigPicOpen(url, wid, hei){
	var w = parseInt(wid) + 20;
	var h = parseInt(hei) + 20;
	leftVal = (screen.width - w) / 2;
	topVal = (screen.height - h) / 2;
	newWindow = window.open(url, 'mywindow', 'toolbar=no, addressbar=no, resizable=no, width='+w+', height='+h+', left='+leftVal+',top='+topVal);
	return false;
}