<td align="right">
支付方式:
</td>
<td style="padding:0px;vertical-align:top;">
<!-- 這里必須用div包著select，否則在ff下不兼容 -->
<span style="color:#ff0000"><div style="position:relative;padding:1px;">
</span> <select id="payType" name="payType" style="position:absolute;" onfocus="expand(this)" onblur="unexpand(this)">
<option>人民幣</option>
<option>美元</option>
<option>信用卡</option>
<option>港幣</option>
<option>港幣</option>
</select>
<span style="color:#ff0000"></div>
</span></td>

function expand(obj){
$(obj).attr("size","10");
}
function unexpand(obj){
$(obj).attr("size","1");
}