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var $ = function(id){
return document.getElementById(id)
}
var replace = function(){
var ul = $("ul"),
lis = ul.innerHTML,
ol = document.createElement("ol");
ul.parentNode.replaceChild(ol,ul);
ol.innerHTML = lis;
replace = function(){}//Ö»ÔÊÐíÖ´ÐÐÒ»´Î
}
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta content="IE=8" http-equiv="X-UA-Compatible"/>
<title>Ìæ»»½Úµã by ˾ͽÕýÃÀ </title>
<script type="text/javascript">
var $ = function(id){
return document.getElementById(id)
}
var replace = function(){
var ul = $("ul"),
lis = ul.innerHTML,
ol = document.createElement("ol");
ul.parentNode.replaceChild(ol,ul);
ol.innerHTML = lis;
replace = function(){}//Ö»ÔÊÐíÖ´ÐÐÒ»´Î
}
</script>
</head>
<body>
<ul id="ul" >
<li>List Item 1</li>
<li>List Item 2</li>
<li>List Item 3</li>
<li>List Item 4</li>
</ul>
<button type="button" onclick = "replace()" >Ìæ»»½Úµã</button>
</body>
</html>
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