JavaScript正则表达式去除HTML标签的完整实现

function deleteTag()
{
  var regx = /<[^>]*>|<\/[^>]*>/gm;
  var tagStr = $("#ul_li").html();
  alert("替换之前的字符串：" + tagStr);
  var result = tagStr.replace(regx,"");
  alert("替换之后的字符串：" + result);
}

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
 <head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>JavaScript替换HTML标签</title>
  <meta http-equiv="pragma" content="no-cache">
  <meta http-equiv="cache-control" content="no-cache">
  <meta http-equiv="expires" content="0">
  <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  <meta http-equiv="description" content="This is my page">
  <script type="text/javascript" src="jquery-1.7.2.min.js"></script>
  <script type="text/javascript">
    function deleteTag()
    {
      var regx = /<[^>]*>|<\/[^>]*>/gm;
      var tagStr = $("#ul_li").html();
      alert("替换之前的字符串：" + tagStr);
      var result = tagStr.replace(regx,"");
      alert("替换之后的字符串：" + result);
    }
  </script>
 </head>
 <body>
   <ul id="ul_li">
    <li class="peach">桃树</li>
    <li class="pear">梨树</li>
    <li>樟树</li>
    <li>枫树</li>
    <li>松树</li>
   </ul>
   <input type="button" value="替换HTML标签" onclick="deleteTag()"/>
 </body>
</html>