js自动闭合html标签,自动补全html标记

假如我有一个DIV，如果没有闭合后面的样式都会乱了，这样的代码可能会影响后面的样式，我希望用js去自动闭合这种没有闭合的标签:

代码如下：

<script type="text/javascript"> 
// Close HTML Tags -------------------------------------------- 
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] ">"; 
} 
/*for(var j=(intOpen-intClose-1);j>=0;j--){ 
str ="</" arrTags[i] ">"; 
}*/ 
} 
return str; 
} 
</script>