Tools/TestWebKitAPI/Tests/mac/JSContextBackForwardCache1.html - WebKit - Git at Google

 <body>
     <div id="test-div"></div>
     <script>
         var testDiv = document.getElementById("test-div");
         if (!testDiv.myCustomProperty)
             insertMyCustomProperty(testDiv);
         else
             checkForMyCustomProperty(testDiv);
     </script>
 </body>
	<body>
	<div id="test-div"></div>
	<script>
	var testDiv = document.getElementById("test-div");
	if (!testDiv.myCustomProperty)
	insertMyCustomProperty(testDiv);
	else
	checkForMyCustomProperty(testDiv);
	</script>
	</body>