[求助]求做一个三级下拉列表框

我找到了二级的,,就是一个产品发布系统的类别选择的下拉列表,一选定大类,小类自动被选,
我现在想要个三级的,就是选定大类小类自动出现所有属于这个大类的小类,然后在这里面选定小类以后,三级类别,所有属于这个小类的所以三级类被自动选定,类似小类的功能..
我现在把二级类的代码和函数公布一下,大家帮忙改一下..

搜索更多相关主题的帖子: 列表 类别 系统 公布

var onecount; onecount=0; subcat = new Array(); <% count = 0 do while not rs.eof %> subcat[<%=count%>] = new Array("<%= trim(rs("sorts"))%>","<%= rs("categoryid")%>","<%= rs("sortsid")%>"); <% count = count + 1 rs.movenext loop rs.close %> onecount=<%=count%>;

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

var locationid=locationid; var i; for (i=0;i < onecount; i++) { if (subcat[i][1] == locationid) { document.myform.sortsid.options[document.myform.sortsid.length] = new Option(subcat[i][0], subcat[i][2]); } } } <% rs.open "select * from category order by categoryorder",conn,1,1 if rs.eof and rs.bof then response.write "没有东西!" response.end else %> <select name="categoryid" size="1" id="categoryid" onChange="changelocation(document.myform.categoryid.options[document.myform.categoryid.selectedIndex].value)"> <option selected value="<%=rs("categoryid")%>"><%=trim(rs("category"))%></option> <% dim selclass selclass=rs("categoryid") rs.movenext do while not rs.eof %> <option value="<%=rs("categoryid")%>"><%=trim(rs("category"))%></option> <% rs.movenext loop end if rs.close %> </select> 所属小类 <select name="sortsid"> <% rs.open "select * from sorts where categoryid="&selclass ,conn,1,1 if not(rs.eof and rs.bof) then %> <option selected value="<%=rs("sortsid")%>"><%=rs("sorts")%></option> <% rs.movenext do while not rs.eof %> <option value="<%=rs("sortsid")%>"><%=rs("sorts")%></option> <% rs.movenext loop end if rs.close rs.open "select * from TimesProList",conn,1,1 %> </select> 大家帮忙改一下..

这是图片

[此贴子已经被作者于2005-8-8 10:58:45编辑过]

java脚本不熟 要是纯asp的你也会做

汗,,那个客户不要.

你用ASP写一个，然后用
iframe弄过去，这样你不说谁知道呀，
我现在整二级互联就这样做！

客户懂得挺多啊

石家庄的客户真牛 不去那混~！！

[转载] <% set rs=server.createobject("adodb.recordset") rs.open"select * from class_two",conn,1,1 %> ‘---------以上是查询出第一级下拉列表的内容----- ’---------以下是用JS来控制程序-------------- <script language = "JavaScript"> var onecount; //定义onecount对像 onecount=0;//初始值为0 subcat = new Array(); //SUBCAT对像是一个新的数组 <% count = 0 '定义count对像初始值为0 do while not rs.eof '循环表头到表尾 %> subcat[<%=count%>] = new Array("<%=rs("class_two_text")%>","<%=trim(rs("class_one"))%>","<%=trim(rs("class_two"))%>"); //以上为重点内容，对像数组（subcat[count对像值]）= 新数组内容('字段名0','字段名1','字段名2')记住要对应 <% count = count + 1 '循环count一次，COUNT的值加1 rs.movenext loop rs.close %> onecount=<%=count%>; function changelocation(locationid) { document.form.class_two.length = 0; var locationid=locationid; var i; for (i=0;i < onecount; i++) { if (subcat[1] == locationid) { document.form.class_two.options[document.form.class_two.length] = new Option(subcat[0], subcat[2]); } } } </script> <% set rs=server.CreateObject("adodb.recordset") rs.open "select * from Class_one" ,conn,1,1 if rs.eof then response.Write"暂无产品一类名称" else%> 产品一类 <select name="class_one" id="class_one" onChange="changelocation(document.form.class_one.options[document.form.class_one.selectedIndex].value)"> <%do while not rs.eof%> <option value="<%=rs("class_one")%>"><%=rs("class_one_text")%></option> <%rs.movenext loop end if %> </select> 产品二类 <select name="class_two" onChange="three(document.form.class_one.value,document.form.class_two.options[document.form.class_two.selectedIndex].value)"> <option value="请选择条件" selected>请选择条件</option> </select> <% set rs=server.createobject("adodb.recordset") rs.open"select * from class_three",conn,1,1 %> <script language = "JavaScript"> var twocount; twocount=0; subthree = new Array(); <% countb = 0 do while not rs.eof %> subthree[<%=countb%>] = new Array("<%=rs("class_three_text")%>","<%=trim(rs("class_one"))%>","<%=trim(rs("class_two"))%>","<%=trim(rs("class_three"))%>"); <% countb = countb + 1 rs.movenext loop rs.close %> twocount=<%=countb%>; function three(threeid,threeid2) { document.form.class_three.length = 0; var threeid=threeid; var threeid2=threeid2; var i; for (i=0;i < twocount; i++) { if ((subthree[1] == threeid) & (subthree[2] == threeid2)) { document.form.class_three.options[document.form.class_three.length] = new Option(subthree[0], [转自：飞腾设计网 www.feitec.com]subthree[3]); } } } </script> 产品三类 <select name="class_three" id="class_three"> <option value="0" selected>请选择条件</option> </select> [转自：飞腾设计网 www.feitec.com]

谢了,,哥们.

http://bbs.bc-cn.net/bbs/dispbbs.asp?BoardID=10&ID=24520 我这里写过现成的，这个JavaScript虽然是两级的但是。稍加更改就可以做成多级的，而且非常简单。