Question

请问用js如何控制下拉框呢?

<select id="Select1" disabled="disabled" runat="Server" onchange="checkct(this)">
<option selected="Selected">请选择</option>
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
</select>
执行js之后把下拉框调成第一个请选择.

Answer 1

<select id="Select1" disabled="disabled" runat="Server" onchange="checkct(this)">
<option id=frist name=frist selected="Selected">请选择</option>
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
</select>

在js中加入document.getElementById("frist").selected="Selected";