如何去掉html标签的js

<script>
	function delHtmlTag(str){
	return str.replace(/<[^>]+>/g,"");//去掉所有的html标记
	}
var str = "<span style='display:none;'>This is test</span><img src=''>ss</img><strong></strong><br/>";
str = delHtmlTag(str);
alert(str);
</script>

function delHtmlTag(str, obj){ 
	var title = str.replace(/<[^>]+>/g,"");//去掉所有的html标记
	if(title.length > 300) {
	title = title.substring(0,300);
	}
	obj.title = title;
}

<td class="col_l" style="text-align: center" onmousemove="delHtmlTag('${content}', this);" id="qqGroupTitle">
<a href="${pageurl}" target="_blank">
<s:property value="#genInfo.content" escape="false"/>
</a>
</td>