<input type=checkbox name=chk>
<input type=checkbox name=chk onclick="alert(this.getAttribute('index'))">
<input type=checkbox name=chk>
<script>
var list = document.getElementsByName("chk");
for(var i=0;i<list.length;i++)
list[i].setAttribute("index",i+1);
</script>
<input type=checkbox name=chk onclick="alert(this.getAttribute('index'))">
<input type=checkbox name=chk>
<script>
var list = document.getElementsByName("chk");
for(var i=0;i<list.length;i++)
list[i].setAttribute("index",i+1);
</script>
function checkme(obj)
{
var checkes = document.getElementsByName("uchk[]");
for (var i=0; i<checkes.length; i++)
{
if (checkes[i].value == obj.value)
{
alert("这是第 "+(i+1)+" 个复选框!");
return true;
}
}
}</script>
</HEAD><BODY>
<form >
<INPUT TYPE="checkbox" NAME="uchk[]" onclick="return checkme(this);" value="4">4
<INPUT TYPE="checkbox" NAME="uchk[]" onclick="return checkme(this);" value="3">3
<INPUT TYPE="checkbox" NAME="uchk[]" onclick="return checkme(this);" value="2">2
<INPUT TYPE="checkbox" NAME="uchk[]" onclick="return checkme(this);" value="1">1
<INPUT TYPE="checkbox" NAME="uchk[]" onclick="return checkme(this);" value="0">0
</form>
</BODY>
</HTML>