var img = new Image();
var pageUrl;
var imgUrl;

function getWidthAndHeight()
{
	wndPopup = window.open(pageUrl + '?img=' + imgUrl, '', 'scrollbars=no,toolbar=no,location=no');
	wndPopup.width = img.width;
	wndPopup.height = img.height;
}

function showPopup(p, i)
{
	pageUrl = p;
	imgUrl = i;

	img.src = imgUrl;
	img.onload = getWidthAndHeight;
}