js事件冒泡与阻止冒泡
<div id="dv">
<div id="dv1">
<div id="dv2"></div>
</div>
</div>
</body>
<script>
function mm(id){
return document.getElementById(id);
}
//事件冒泡
mm("dv").onclick=function(e){
console.log(e.target);
}
mm("dv1").onclick=function(){
console.log(this.id);
//阻止事件冒泡
window.event.cancelBubble=true;
}
mm("dv2").onclick=function(e){
console.log(this.id);
//不支持ie8浏览器
e.stopPropagation();
}
</script>