function popImage (i, w, h)
{
	w = w+20;
	h = h+20;
	
	aWidth = screen.availWidth;
	aHeight = screen.availHeight;
	
	iTop	= (aHeight - h) / 2;
	iLeft	= (aWidth - w) / 2;
	
	params = "locationbar=no, toolbar=no, scrollbars=no, status=no, width="+w+", height="+h+", top="+iTop+", left="+iLeft;
	
	
	window.open(i, 'imgpopup', params);
}