<td width="350px;">企業名稱:&nbsp;
<input type="text" name="filter_psName" id="psName" size="40"/>
</td>
<td width="200px;">區域:&nbsp;
<select name="filter_regionCode" id="regionName" theme="simple" />
</td>
<td>
<s:radio onclick="query();" name="filter_status" theme="simple" ></s:radio>
</td>
<td valign="middle" align="center">
<img src="${ctx}/common/img/icons/icon403a3.gif" height="20" />查詢

</td>

$(document).keydown(function (e) {
var doPrevent;
if (e.keyCode == 8) {
var d = e.srcElement || e.target;
if (d.tagName.toUpperCase() == 'SELECT') {
doPrevent = d.readOnly || d.disabled;
}
else
doPrevent = true;
}
else
doPrevent = false;
if (doPrevent)
e.preventDefault();
});

//屏蔽下拉框的退格鍵操作
$(document).keydown( function(e)
{
//獲取鍵盤的按鍵CODE
var k=e.keyCode;
//獲取操作的標簽對象
var obj=e.target || e.srcElement;
//獲取對象的只讀屬性的值
var vReadOnly = obj.getAttribute('readonly');
//如果按鍵為“backspace”并且標簽對象的只讀屬性不為空時return false（select 標簽默認 readonly=“readonly”）
if(k==8 && vReadOnly!=null){
return false;
}
});