三级连动的下拉框（数据库版）--吐血推荐三级下拉框连动 ‘ ‘数据库： ‘location ‘表1 loaction 所在地表 ‘ 字段 ‘ loactionid ‘ loactionname 名字 ‘表2 district 所在的地区表 ‘ 字段 ‘ locationid ‘ districtid ‘ districtname ‘表3 village 所在的县区表 ‘ 字段 ‘ districtid ‘ villageid ‘ villagename <%Option Explicit%> <html> <head> <title>List</title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <% dim conn dim rs dim sql dim count dim rs1 dim sql1 dim rs2 dim sql2 dim count2 set conn=server.createobject("adodb.connection") conn.open"provider=sqloledb;data source=192.168.0.33;uid=sa;pwd=;database=location;" sql = "select * from district order by locationid asc" set rs = conn.execute(sql) %> <script language = "JavaScript"> var onecount; onecount=0; subcat = new Array(); <% count = 0 do while not rs.eof %> subcat<<%=count%>> = new Array("<%= trim(rs("districtname"))%>","<%= trim(rs("locationid"))%>","<%= trim(rs("districtid"))%>"); <% count = count + 1 rs.movenext loop rs.close set rs=nothing %> onecount=<%=count%>; function changelocation(locationid) { document.myform.smalllocation.length = 0; var locationid=locationid; var i; document.myform.smalllocation.options<0> = new Option(‘==所选城市的地区==‘,‘‘); for (i=0;i < onecount; i++) { if (subcat<1> == locationid) { document.myform.smalllocation.options = new Option(subcat<0>, subcat<2>); } } } </script> <%sql2 = "select * from village order by districtid asc" set rs2 = conn.execute(sql2) %> <script language = "JavaScript"> var onecount2; onecount2=0; subcat2 = new Array(); <% count2 = 0 do while not rs2.eof %> subcat2<<%=count2%>> = new Array("<%= trim(rs2("villagename"))%>","<%= trim(rs2("districtid"))%>","<%= trim(rs2("villageid"))%>"); <% count2 = count2 + 1 rs2.movenext loop rs2.close set rs2=nothing %> onecount2=<%=count2%>; function changelocation2(villageid) { document.myform.village.length = 0; var villageid=villageid; var j; document.myform.village.options<0> = new Option(‘==所选地区的县区==‘,‘‘); for (j=0;j < onecount2; j++) { if (subcat2<1> == villageid) { document.myform.village.options = new Option(subcat2<0>, subcat2<2>); } } } </script> </head> <body> <form name="myform" method="post"> 题目：<input type="text" name="T2" size="20"> 来源：<input type="text" name="T3" size="20"> 分类：<select name="biglocation" onChange="changelocation(document.myform.biglocation.options.value)" size="1"> <option selected>请选择你所在的省份</option> <% sql1 = "select * from location order by locationname asc" set rs1 = conn.Execute (sql1) do while not rs1.eof %> <option value="<%=trim(rs1("locationid"))%>"><%=trim(rs1("locationname"))%></option> <% rs1.movenext loop rs1.close set rs1 = nothing conn.Close set conn = nothing %> </select><select name="smalllocation" onChange="changelocation2(document.myform.smalllocation.options.value)"> <option selected value="">==所有地区==</option> </select><select name="village" size="1"> <option selected>==所有县区==</option> </select> 关键词：<input type="text" name="T4" size="20"> 内容：<textarea rows="9" name="S1" cols="51"></textarea> </form> </body> </html>
