javascript检查并闭合没有闭合html元素

<script>
function closeHTML(str){ 
 var arrTags=["span","font","b","u","i","h1","h2","h3","h4","h5","h6","p","li","ul","table","div"]; 
 for(var i=0;i<arrTags.length;i++){ 
   var intOpen=0; 
   var intClose=0; 
   var re=new RegExp("\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\<"+arrTags[i]+"( [^\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\<\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\>]+|)\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\>","ig"); 
   var arrMatch=str.match(re); 
   if(arrMatch!=null) intOpen=arrMatch.length; 
   re = new RegExp("\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\<\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/" + arrTags[i] + "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\>", "ig");
   arrMatch=str.match(re); 
   if(arrMatch!=null) intClose=arrMatch.length; 
   for(var j=0;j<intOpen-intClose;j++){ 
     str += "</" + arrTags[i] + ">";
   } 
 } 
 return str; 
}
</script>