点击超链接 给文本框赋值

<input type=text id=demo>
<a href=# id=m1>文字1</a>
<a href=# id=m2>文字2</a>
<a href=# id=m3>文字3</a>
<a href=# id=m4>文字4</a>
<a href=# id=m5>文字5</a>
<script>
//定义事件

var txt_box=document.getElementById("demo");
var a1=document.getElementById("m1");
a1.onclick=function(){txt_box.value=this.innerHTML;return false;}
var a2=document.getElementById("m2");
a2.onclick=function(){txt_box.value=this.innerHTML;return false;}
var a3=document.getElementById("m3");
a3.onclick=function(){txt_box.value=this.innerHTML;return false;}
var a4=document.getElementById("m4");
a4.onclick=function(){txt_box.value=this.innerHTML;return false;}
var a5=document.getElementById("m5");
a5.onclick=function(){txt_box.value=this.innerHTML;return false;}
</script>