匹配html标记的正则

<P><textarea id="htmlCode" rows="5" cols="50"> <namespace:span id="1\">'</P> <P> >" name= spanName /> <span id="2"> <span id="3" /> <span id="4"> <span></span> </span> <span id="6" /> <div></div> </span> <div> <div></div> </div> <span id="5"></span> </textarea> </P> <P><script> function htmlTag() { re = /<(\/\s*)?((\w+:)?\w+)(\w+(\s*=\s*((["'])(\\["'tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>/ig return htmlCode.value.match(re) } </script> <button onclick="alert(htmlTag().join('\n------------------------------------\n'))">匹配</button> </P>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]