open image in browser fit to screen with window.open
$(".view-full-size").click(function() {
var mainScreenshot = $("#main-screenshot");
var theImage = new Image();
theImage.src = mainScreenshot.attr("src");
var winWidth = theImage.width + 20;
var winHeight = theImage.height + 20;
window.open(this.href, null, 'height=' + winHeight + ', width=' + winWidth + ', toolbar=0, location=0, status=0, scrollbars=0, resizable=0');
return false;
});