真正实现 select 下拉 只读 readonly
?
??原理:<select onchange="this.selectedIndex=1"> <option>1 </option> <option selected>2 </option> <option>3 </option> </select>
?原理:
<select onchange="this.selectedIndex=1"> <option>1 </option> <option selected>2 </option> <option>3 </option> </select>