<input value ="按钮1" name="我是第1个input" type="button"/>
 <input value ="按钮2" name="我是第2个input"/>
 <input value ="按钮2" name="我是第3个input"/>

<script>
var ts = document.getElementsByTagName("input");
 for(var i=0;i<ts.length;i++){ts[i].onclick=function(){
 alert("名字:" + this.name);
 }}
  
  
// ts[i].οnclick=function(){alert("名字:" + this.name); //这条ts[i]是拿到点滴的input的属性
// document.getElementById("url").οnclick=function(){alert("名字:" + this.name);}//等同这条
</script>

 <textarea id="tc_url" rows="3" cols="35" name="tc_url"></textarea>
 <p><span id=w6>11</span>♦  
    <span id=w7>22</span>♦  
    <span id=w8>33</span>♦ </p>
<script>
var ts=document.getElementsByTagName("span");
for(var i=0;i<ts.length;i++){ts[i].onclick=function(){
document.getElementById("tc_url").value = this.innerHTML;
}}
</script>

 <textarea id="tc_url" rows="3" cols="35" name="tc_url"></textarea>
 <button name="我我">11111111</button>
 <button name="你你">22222222</button>
 <button name="他他">33333333</button>

<script>
var ts=document.getElementsByTagName("button");
for(var i=0;i<ts.length;i++){ts[i].onclick=function(){
document.getElementById("tc_url").value = this.innerHTML + this.name;
}}
</script>