html:
```
<span class="select-box" style="width: 120px">
<select class="select" id="audit" >
<option value="0">选择审款结果</option>
<option value="2">未审款订单</option>
<option value="1">已审款订单</option>
<option value="3">已拒绝订单</option>
</select>
</span>
```
js:
var audit=$("#audit option:selected").val(); //获取选中的项
