Making it more robust for all browsers

media/com_wrapper/js/iframe-height.js

@@ -1,13 +1,17 @@
 function iFrameHeight()
 {
-	var h = 0;
-	if (!document.all)
-	{
-		h = document.getElementById('blockrandom').contentWindow.document.body.scrollHeight;
-		document.getElementById('blockrandom').style.height = parseInt(h) + 60 + 'px';
-	} else if (document.all)
-	{
-		h = document.frames('blockrandom').document.body.scrollHeight;
-		document.all.blockrandom.style.height = parseInt(h) + 20 + 'px';
-	}
+    var height = 0;
+    var iframe = document.getElementById('blockrandom');
+    var doc    = 'contentDocument' in iframe ? iframe.contentDocument : iframe.contentWindow.document;
+
+    if (!document.all)
+    {
+        height = doc.body.scrollHeight;
+        iframe.style.height = parseInt(height) + 60 + 'px';
+    }
+    else if (document.all)
+    {
+        height = doc.body.scrollHeight;
+        document.all.blockrandom.style.height = parseInt(height) + 20 + 'px';
+    }
 }