Question

asp两级联动

我在一张表中有 id，parentid（父类Id）， name.我想实现动态两级联动效果。。。选择一级下拉框，查询出子目录显示在另一个下拉框。不要提交表单的那种。。如何实现。。请大家帮忙，最好有代码的。。谢谢。。。

Answer 1

下拉选择框联动 asp如果不用ajax的话只能利用asp和js实现下面是我常用的一段联动代码：<script language="javascript">
var onecount;
onecount=0;
subcat = new Array();
subcat[0] = new Array("1","第一个","顶部");
subcat[1] = new Array("2","第二个","顶部");
subcat[2] = new Array("1","第一个","底部");
subcat[3] = new Array("2","第二个","底部");
subcat[4] = new Array("3","第三个","底部");
subcat[5] = new Array("4","第四个","底部");
onecount=6;//联动函数
function changelocation(locationid)
{
document.myform.Adorder.length = 0;
var locationid=locationid;
var i;
for (i=0;i < onecount; i++)
{
if (subcat[i][2] == locationid)
{
//var newOption1=new Option(subcat[i][1], subcat[i][0]);
//document.all.ctype.add(newOption1);
document.myform.Adorder.options[document.myform.Adorder.length] = new Option(subcat[i][1], subcat[i][0]);
}
}

}
</script>
<select name="Adress" id="Adress" onchange="changelocation(document.myform.Adress.options[document.myform.Adress.selectedIndex].value)" >
<option>请选择</option>
<option value="顶部">顶部</option>
<option value="底部">底部</option>
</select>
<select name="Adorder">
<option>请选择</option>
</select>其中JS下面这段可以asp函数调用，查询输入二级查单 onecount=0;
subcat = new Array();
subcat[0] = new Array("1","第一个","顶部");
subcat[1] = new Array("2","第二个","顶部");
subcat[2] = new Array("1","第一个","底部");
subcat[3] = new Array("2","第二个","底部");
subcat[4] = new Array("3","第三个","底部");
subcat[5] = new Array("4","第四个","底部");
onecount=6;//联动函数