<script type="text/javascript">
var brand='${xxx}';
if(brand!=""){
var s = document.getElementById("brand");
var ops = s.options;
for(var i=0;i<ops.length; i++){
var tempValue = ops[i].value;
if(tempValue == brand)
{
ops[i].selected = true;
break;
}
}
}
</script>原文:http://blog.csdn.net/xuke6677/article/details/42081277