diff --git a/demoassets/main.js b/demoassets/main.js
index 9ed4a1f..0458c94 100644
--- a/demoassets/main.js
+++ b/demoassets/main.js
@@ -60,7 +60,23 @@ $(function(){
 		$('#image-diff').html(diffImage);
 
 		$(diffImage).click(function(){
-			window.open(diffImage.src, '_blank');
+			var w = window.open("about:blank", "_blank");
+			var html = w.document.documentElement;
+			var body = w.document.body;
+
+			html.style.margin = 0;
+			html.style.padding = 0;
+			body.style.margin = 0;
+			body.style.padding = 0;
+
+			var img = w.document.createElement("img");
+			img.src = diffImage.src;
+			img.alt = "image diff";
+			img.style.maxWidth = "100%";
+			img.addEventListener("click", function() {
+				this.style.maxWidth = this.style.maxWidth === "100%" ? "" : "100%";
+			});
+			body.appendChild(img);
 		});
 
 		$('.buttons').show();