js引号的多层嵌套

<script type="text/javascript">

function delName(obj,divNum){
if(obj.length>8){
var creatDiv="<button type='button'  style='background: transparent;'   class='btn' onmouseover='document.getElementById(\"div"+divNum+"\").style.display=\"inline\"'    onmouseout='document.getElementById(\"div"+divNum+"\").style.display=\"none\"\'>   "+obj.substring(0,8)+"...</button>"+"<div  class='delNum' id=\'div"+divNum+"\'   >"+obj+"</div>";
return creatDiv;
}
else{
return obj;
}
}

</script>