<script language = "JavaScript"> var onecount; onecount=0; subcat = new Array(); <% int count = 0; ResultSet rs,rs1,rs2; area.connect(); String city,code;
city =request.getParameter("bigsortselect"); /*******************问题在这里***********/ rs = area.Query("select districtcode from PROVINCEINFO where name = '" + city +"'"); while(rs.next()) { String sname=new String(rs.getString("city_name"));//转换字符类型 %> subcat[<%=count%>] = new Array("<%=sname%>");//产生数组 <% count = count + 1; } %> onecount=<%=count%>;
function changelocation() {
document.form1.smallsortselect.length = 0; var i; document.form1.smallsortselect.options[0] = new Option('选择二级分类',''); for (i=0;i < onecount; i++) { document.form1.smallsortselect.options [document.form1.smallsortselect.length] = new Option(subcat[i][0]);
想制作一个两级联动的下拉框，一级（bigsortselect）列出一些省份的名字，二级（smallsortselect）列出一级当前省份的代码。
现在的问题是：
通过
city＝getParameter("bigsortselect");
无法获得一级下拉框当前的值，从而无法组成SQL语句，进而得不到与之对应的该省的代码<%@ page contentType="text/html;charset=gb2312"
import ="java.util.*,java.sql.*"%>
<jsp:useBean id="area" scope="page" class="jspora.conora" /><html>
<head>
<title>后台产品添加</title>
<meta http-equiv="Content-Type" content="text/HTML; charset=gb2312">
<link href="../INC/Style.Css" rel="stylesheet" type="text/css">
<script language = "JavaScript">
var onecount;
onecount=0;
subcat = new Array();
<%
int count = 0;
ResultSet rs,rs1,rs2;
area.connect();
String city,code;
city =request.getParameter("bigsortselect"); /*******************问题在这里***********/ rs = area.Query("select districtcode from PROVINCEINFO where name = '" + city +"'");
while(rs.next())
{
String sname=new String(rs.getString("city_name"));//转换字符类型
%>
subcat[<%=count%>] = new Array("<%=sname%>");//产生数组
<%
count = count + 1;
}
%>
onecount=<%=count%>;
function changelocation()
{
document.form1.smallsortselect.length = 0;
var i;
document.form1.smallsortselect.options[0] = new Option('选择二级分类','');
for (i=0;i < onecount; i++)
{ document.form1.smallsortselect.options [document.form1.smallsortselect.length] = new Option(subcat[i][0]);
}
}
</script>
</head>
<body bgcolor="#FFFFFF">
<form name="form1" method="post" action="">
<table width="500" border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
<td width="180" height="20" align="right">选择一级分类:</td>
<td width="320">
<select name="bigsortselect" onChange="changelocation(document.form1.bigsortselect.options[document.form1.bigsortselect.selectedIndex].value)" size="1">
<option value="" >请选择一级分类</option>
<%
rs2 = area.Query("select province_name from provinceinfolist");
while(rs2.next())
{
String Bname = new String(rs2.getString("province_name"));
System.out.println(Bname);
%>
<option value="<%=Bname%>"><%=Bname%></option><%
}
%>
</select><br>
</td>
</tr>
<br>
<tr>
<td height="20" align="right">选择二级分类:</td>
<td>
<select name="smallsortselect">
<option value="" selected>请选择二级分类</option>
</select>
</td>
</tr>
<tr>
<td height="20" colspan="2" align="center"><input type="submit" name="Submit" value="提交"></td>
</tr>
<script LANGUAGE="JavaScript">
changelocation();
</script>
</table>
</form>
</body>
</html>