在动态更改的选择列表中将选项值设置为空

Question

How can I modify this code: 如何修改此代码：

so that the '--None--' selections are outputted as 这样，“-None--”选项将输出为

<option value="">--None--</option>

instead of 代替

<option value="--None--">--None--</option>

Thanks. 谢谢。

Answer 1

Didn't put much time into your question, So here's a simple fix. 没花太多时间在您的问题上，所以这里有一个简单的解决方法。

if(programs[i][1] == '--None--') {
    var opt = new Option(programs[i][1],'' );
}else{
    opt = new Option(programs[i][1]);
}