<a href="javascript:replaceMessage()"> 将加粗改为斜体</a>
<script type="text/javascript">
function replaceMessage(){
var oldnode=document.getElementById("oldnode");
var newnode=document.createElement("i");
newnode.innerHTML=oldnode.innerHTML
oldnode.parentNode.replaceChild(newnode,oldnode);
}
</script>
即可调用!!!