for (var i=0;i<document.getElementById("bigname").options.length;i++)
{
if(document.getElementById("bigname").options[i].value==bignameOption){
document.getElementById("bigname").selectedIndex=i;
break;
}
}
//bigname為下拉框的id
//bignameOption為需要選擇的值
{
if(document.getElementById("bigname").options[i].value==bignameOption){
document.getElementById("bigname").selectedIndex=i;
break;
}
}
//bigname為下拉框的id
//bignameOption為需要選擇的值