jquery遍曆select元素

 本文章提供一款jquery遍曆select教程代碼，主要是利用了$("#<%=ddl_xreg_id.clientid%> option").each(function() {形式來each遍曆一次，這樣所有的select就給查詢了一次。<script src="jquery-1.2.1.js" type="text/網頁特效"></script><script language="javascript" type="text/javascript">$(document).ready(function(){$("#selecttest").change(function(){       //alert("hello");       //alert($("#selecttest").attr("name"));       //$("a").attr("href","xx.html");       //window.location.href="xx.html";       //alert($("#selecttest").val());       alert($("#selecttest option[@selected]").text());       $("#selecttest").attr("value", "2");});});</script><a href="#">aaass</a><!--下拉框--><select id="selecttest" name="selecttest"><option value="1">11</option><option value="2">22</option><option value="3">33</option><option value="4">44</option><option value="5">55</option><option value="6">66</option></select>方法二function autoscrollregion() {        var reg_name = $("#<%=txt_reg_name.clientid%>").val();        $("#<%=ddl_xreg_id.clientid%> option").each(function() {        if ($(this).text() == reg_name) {                $(this).attr("selected", "selected");                break;            }        });          }