删除节点的步骤：先获取父节点，再通过父节点删除自己
<div id="father">
<h1>标题一</h1>
<p id="p1">p1</p>
<p class="p2">p2</p>
</div>
<script>
var self=document.getElementById(p1);
var father=p1.parentElement;
father.removeChild(self)
//删除是一个动态的过程： father.removeChild(father.children[0]) father.removeChild(father.children[1]) father.removeChild(father.children[2])
</script>
注意：删除多个节点的时候，children是在时刻变化的，删除节点的时候一定要注意！