<select name=select1 onchange=hoho()>
<option value=1 selected>1
<option value=2>2
</select>
<script>
function hoho(){
if(confirm("确定吗?")){
return true;
}
else{
document.all.select1.value="1";
}
}
</script>
<option value=1 selected>1
<option value=2>2
</select>
<script>
function hoho(){
if(confirm("确定吗?")){
return true;
}
else{
document.all.select1.value="1";
}
}
</script>
<select name=select1 onchange=hoho()>
<option value=1 selected>1
<option value=2>2
</select>
<script>
var woyingjie;
function ho(){
woyingjie=document.all.select1.value
}
function hoho(){
alert(woyingjie)
if(confirm("确定吗?")){
return true;
}
else{
document.all.select1.value=woyingjie;
}
}
</script>