ie6/7/8 innerHTML 失效
<!DOCTYPE>
<html>
<head>
<title> new document </title>
</head>
<body>
</body>
</html>
<script type="text/javascript">
<!--
var p = document.createElement("p");
p.setAttribute("id", "box");
document.body.appendChild(p);
var box = document.getElementById("box");
box.innerHTML = "<h1>Inner Html</h1>";
//-->
</script>
var p = document.createElement("div");