<html>
<head>
<script>
window.onload = function(){
var opts = document.getElementById("select");
var value = 2//這個值就是你獲取的值;
if(value!=""){
for(var i=0;i<opts.options.length;i++){
if(value==opts.options[i].value){
opts.options[i].selected = 'selected';
alert(opts.options[i].value);
break;
}
}
}
}
</script>
</head>
<body>
<select id="select">
<option value="1">1231231</option>
<option value="2">12312312</option>
<option value="3">123123123</option>
</select>
</body>
</html>
