<span style="font-family:Microsoft YaHei;"><select id="lstTest" onfocus="this.defaultIndex=this.selectedIndex;" onchange="this.selectedIndex=this.defaultIndex;">
<option value="1">test1</option>
<option value="2">test2</option>
<option value="3" selected="selected">test3</option>
<option value="4">test4</option>
<option value="5">test5</option>
</select>
</span>

<span style="font-family:Microsoft YaHei;"><script type="text/javascript">
//加载时设置disabled生效
$(document).ready(function(){
$("input[name=category]").attr("disabled",true);
$("select[name=sonota_kbn]").attr("disabled",true);
});
//提交时设置disabled失效
$("input[name=modify]").click(function(){
$("input[name=category]").attr("disabled",false);
$("select[name=sonota_kbn]").attr("disabled",false);
});
</script> </span>