diff --git a/opener/iframe.html b/opener/iframe.html
new file mode 100644
index 0000000..8d7deba
--- /dev/null
+++ b/opener/iframe.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <title>Opener</title>
+    </head>
+    <body>
+        <iframe src="index.php" width="500" height="800"></iframe>
+    </body>
+</html>
diff --git a/opener/index.php b/opener/index.php
index 059c9ea..d7db748 100644
--- a/opener/index.php
+++ b/opener/index.php
@@ -18,19 +18,26 @@
 		<script>
 			window.onload = function() {
 
-                if (window.opener) {
-                    document.getElementById("opener").innerText = window.opener;
-                    document.getElementById("opener").className = "green";
-                } else {
-                    document.getElementById("opener").innerText = "Null";
-                }
+				if (window.opener) {
+					document.getElementById("opener").innerText = window.opener.location || window.opener;
+					document.getElementById("opener").className = "green";
+				} else {
+					document.getElementById("opener").innerText = "Null";
+				}
 
-                if (window.name) {
-                    document.getElementById("name").innerText = window.name;
-                    document.getElementById("name").className = "green";
-                } else {
-                    document.getElementById("name").innerText = "Empty String";
-                }
+				if (window.name) {
+					document.getElementById("name").innerText = window.name;
+					document.getElementById("name").className = "green";
+				} else {
+					document.getElementById("name").innerText = "Empty String";
+				}
+
+				if (document.referrer) {
+					document.getElementById("referrer").innerText = document.referrer;
+					document.getElementById("referrer").className = "green";
+				} else {
+					document.getElementById("referrer").innerText = "Empty string";
+				}
 
 			}
 		</script>
@@ -41,6 +48,14 @@
 		<h2>JavaScript</h2>
 		&emsp;window.opener: <span id="opener" class="grey">Enable JavaScript</span>
 		<br><br>
+		&emsp;document.referrer: <span id="referrer" class="grey">Enable JavaScript</span>
+		<br><br>
 		&emsp;window.name: <span id="name" class="grey">Enable JavaScript</span>
+		<h2>Test yourself</h2>
+		&emsp;<a href="#" onclick="window.open(location.href)">window.open()</a>
+		<br><br>
+		&emsp;<a href="/opener">&lt;a&gt;</a>
+		<br><br>
+		&emsp;<a href="/opener/iframe.html">&lt;iframe&gt;</a>
 	</body>
-</html>
\ No newline at end of file
+</html>
