对select中数据的调用操作

<script language="javascript">
function appear(){
var s=document.all.select
var t=s.options[s.options.selectedIndex].text
var v=s.options[s.options.selectedIndex].value
var i=0;
var x,y;
x=v.substring(0,v.indexOf(","));
y=v.substring(v.indexOf(",")+1,v.length);
alert(x);
alert(y);
}

</script>

<select size="10" onDBlClick="appear();" name="select">
<option value="100,200">11</option>
<option value="2,4">22</option>
</select>

另：

 for (i=0;i<form.select.options.length;i++) {
    if (document.form.select.options[i].value==temp) a6=document.form.select.options[i].text;    
  }

for (i=0;i<form.select.options.length;i++) {         
         var temp=s.options[i].text;         
         if (temp==某一值) form.select.options[i].selected=true;
}