<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>select</title>
</head>
<body>
<div>
<select name="" id="selId">
<option value="one">1</option>
<option value="two">2</option>
<option value="three">3</option>
<option value="four">4</option>
</select>
</div>
<!-- è¿æ¯jsé¨åï¼ -->
<script>
window.onload=function(){
var optElements=document.getElementById("selId").children;
var optValue='three';//è¿æ¯å·²ç¥çå¼
for(var opt in optElements){
if(optElements[opt].value==optValue){
optElements[opt].selected="selected";
return;
}
}
}
</script>
</body>
</html>