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<html>
<head>
<style>
span#dd:before {
display: inline;
white-space: pre;
content: "bef-\Aore";
color: gray;
}
</style>
<script>
function boo()
{
var div = document.getElementById("div");
var dd = document.getElementById("dd");
var newTextNode = document.createTextNode("new");
dd.insertBefore(newTextNode, div);
}
window.addEventListener("load", boo, false);
</script>
</head>
<body>
<span id="dd"><div id="div">div</div></span>
</body>
</html>
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