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HTML/XHTML教程
关于网页源代码屏蔽(2)
关于网页源代码屏蔽(3)
HTML组件之:HTML行为和HTC行为
HTML组件之:定义标记和命名空间
HTML组件之:最顶级页面(1)
HTML组件之:最顶级页面(2)
HTML组件之:最顶级页面(3)
HTML组件之:编写日历(1)
HTML组件之:编写日历(2)
HTML组件之:编写日历(3)
HTML组件之:ANYDAY 和 TODAY HTC(1)
HTML组件之:ANYDAY 和 TODAY HTC(2)
HTML组件之:日历主页面
HTML组件之:CALENDAR HTC
CSS代码缩写技巧
CSS的十八般技巧(1)
CSS的十八般技巧(2)
HTML中小meta的大作用
CSS类及id的规范化命名
创建一个纯CSS的水平导航条

HTML/XHTML教程 中的 连动下拉菜单


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<html>
<head>
<title>List</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script LANGUAGE="javascript">
<!--
var onecount;
onecount=0;
   
subcat = new Array();
subcat[0] = new Array("徐汇区","01","001");
subcat = new Array("嘉定区","01","002");
subcat = new Array("黄浦区","01","003");
subcat = new Array("南昌市","02","004");
subcat = new Array("九江市","02","005");
subcat = new Array("上饶市","02","006");

onecount=6;

function changelocation(locationid)
    {
    document.myform.smalllocation.length = 0;

    var locationid=locationid;
    var i;
    document.myform.smalllocation.options[0] = new Option('====所有地区====','');
    for (i=0;i < onecount; i++)
        {
            if (subcat[i] == locationid)
            {
            document.myform.smalllocation.options[document.myform.smalllocation.length] = new Option(subcat[i][0], subcat[i]);
            }       
        }
       
    }   

//-->
</script>
</head>
<body>
<form name="myform" method="post">
    <select name="biglocation" onChange="changelocation(document.myform.biglocation.options[document.myform.biglocation.selectedIndex].value)">
        <option value="01" selected>上海</option>
        <option value="02">江西</option>
    </select>
    <select name="smalllocation">
        <option selected value="">==所有地区==</option>
    </select>
</form>
<script LANGUAGE="javascript">
<!--
    changelocation(document.myform.biglocation.options[document.myform.biglocation.selectedIndex].value);

//-->
</script>
</body>
</html>