<select onkeypress="return false">
<option>111</option>
<option>222</option>
<option>333</option>
<option>444</option>
</select>
<option>111</option>
<option>222</option>
<option>333</option>
<option>444</option>
</select>
<option>111</option>
<option>222</option>
<option>333</option>
<option>444</option>
</select>
event.returnValue = false;
就搞定了..感谢两位能参与..谢谢..