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var parseHTML = function(str) {
if(document.createRange){
var range = document.createRange()
range.setStartAfter(document.body)
return range.createContextualFragment(str)
}else{
return document.createElement(str)
}
}
var wrapOuter = function(target,html){
var wrap = parseHTML(html) ;
target.parentNode.insertBefore(wrap,target);
target.previousSibling.appendChild(target)
}

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<html dir="ltr" lang="zh-CN">
<head>
<meta charset="utf-8"/>
<meta content="IE=8" http-equiv="X-UA-Compatible"/>
<style type="text/css">
.wrapper {
margin: 5px 5px 5px 5px;
padding: 5px 5px 5px 5px;
background-color:#dfe8f6;
border: 1px solid magenta;
}
.inner{
margin:1em;
height:20px;
background:#a9ea00
}
.border{
border:2px solid red;
}
</style>
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<script type="text/javascript">
window.onload = func


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