如何对onchange事件动态编辑？

Question

onchange++?添加和删除事件
document.all.input1.attachEvent("onchange",fun1)
document.all.input1.detachEvent("onchange",fun1)
 

Answer 1

<input name="input1" onclick="fun1()"><script>
//document.all.input1.onchange++;
str = "alert('1');";
function fun1()
{
eval(str);
}
function add()
{
str+="alert('2');";
}
</script>
<input type="button" name="" value='加' onclick=add()>

Answer 2

sorry:
<input name="input1" onclick="fun1()">
to
<input name="input1" onchange="fun1()">

Answer 3

<script>
function a(){alert(1)}
function b(){alert(2)}
aa.attachEvent("onclick",a)
aa.attachEvent("onclick",b)
</script>

Answer 4

<script>
function a(){alert(1)}
function b(){alert(2)}
aa.attachEvent("onclick",a)
aa.attachEvent("onclick",b)
</script>
取消绑定用detachEvent