实例演示:jsp+javascript打造级连菜单

<%@ page import="java.util.Date,yava.fileapp.*,java.sql.*;"
         contentType="text/html;charset=GB2312" pageEncoding="GB2312"
%>
<style>
.f9{ font-size:9pt; }
.bgc{ background-color:#AECAF9; color: #0033FF }
.buttons{font-family:Arial; font-size:13px; font-weight:bold; background-color:#6796E4; color:white; border-top: solid 2px #AACAFB;
   border-bottom: solid 1px #4E7DC1;
border-left: solid 1px #AECAF9;
border-right: solid 1px #5679BD;
   padding:1px;
margin:0px;}
</style>
<SCRIPT LANGUAGE="JavaScript">
<!--
function rv()
{
   var val="";
   for(i=0;i<combo_box.list2.length;i++){
   val+=","+combo_box.list2[i].value;
   }
   if(val.charAt(0)==","){
   val=val.substr(1,val.length);
   }
opener.form1.frecname.value=val;
    self.close();
}

//-->
</SCRIPT>
<body leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">
<jsp:useBean id="user" scope="session" class="yava.fileapp.UserBean" />
<%
   CDataSource ds=new CDataSource(); //数据联结Bean实例
java.sql.Connection conn=ds.getConnection();
java.sql.Statement stmt=null;
    java.sql.ResultSet rs=null;
   CDataCheck dc=new CDataCheck();
%>

<%
String sqlu="SELECT t1.fno, t1.fname, t2.fname AS fdept FROM tuser t1 LEFT OUTER JOIN TDept t2 ON t1.fdept = t2.fno order by t2.fname";
stmt=conn.createStatement();
rs=stmt.executeQuery(sqlu);
%>
<script language='Javascript'>
arr = new Array();
<% int temp=0;
while(rs.next())
{
%>
arr[<%=temp%>]=new Array("<%=rs.getString("fname")%>","<%=rs.getString("fdept")%>");
<%
temp = temp + 1;
}
%>
temp=<%=temp%>;
function ChangeLocation(id){
document.combo_box.city.length=0; //初始化第2级菜单的长度，下标从0开始
var i = 0;
document.combo_box.city.options[0]=new Option('-------','');
for(i=0;i<temp;i++){
if(arr[i][1]==id){//如果相等，证明在第2级里面有输入第1级组织的子集,arr[总数目][部门]
document.combo_box.city.options[document.combo_box.city.length] = new Option(arr[i][0], arr[i][0]);
}
}
}
</script>

<tr>
    <td>
    <select multiple id=prov name="prov" onchange="ChangeLocation(combo_box.prov.options[combo_box.prov.selectedIndex].text);" style="width:150;height:200" class="bgc">
  <option value="0">请选择部门 ---></option>
<%
   String sqld="SELECT * FROM tdept";
   stmt=conn.createStatement();
   rs=stmt.executeQuery(sqld);
   while(rs.next())
   {
%>
  <option name="<%=rs.getString("fno")%>"><%=rs.getString("fname")%></option>
<%
}
%>
  </select>
</td>
    <td>
  <select multiple id=city style="width:150;height:200" class="bgc">
   </select>
   </td>
    <td nowrap align="center" class="bgc">
  <input type="button" onClick="move(this.form.list2,this.form.city)" value="<<" class="buttons">
  <input type="button" onClick="move(this.form.city,this.form.list2)" value=">>" class="buttons">
</td>
    <td>
  <select multiple size="10" name="list2" style="width:150;height:200" class="bgc">
  </select>
</td>
</tr>
    <tr class="bgc">
    <td colspan="4" align="center"><input type="button" name="button1" class="buttons" value="选好了！" onclick="rv();"></td>
   </tr>
</table>
</form>

//人名移动
function move(fbox, tbox) {
var arrFbox = new Array();
var arrTbox = new Array();
var arrLookup = new Array();
var i;
for (i = 0; i < tbox.options.length; i++) {
arrLookup[tbox.options[i].text] = tbox.options[i].value;
arrTbox[i] = tbox.options[i].text;
}
var fLength = 0;
var tLength = arrTbox.length;
for(i = 0; i < fbox.options.length; i++) {
arrLookup[fbox.options[i].text] = fbox.options[i].value;
if (fbox.options[i].selected && fbox.options[i].value != "") {
arrTbox[tLength] = fbox.options[i].text;
tLength++;
}
else {
arrFbox[fLength] = fbox.options[i].text;
fLength++;
}
}
arrFbox.sort();
arrTbox.sort();
fbox.length = 0;
tbox.length = 0;
var c;
for(c = 0; c < arrFbox.length; c++) {
var no = new Option();
no.value = arrLookup[arrFbox[c]];
no.text = arrFbox[c];
fbox[c] = no;
}
for(c = 0; c < arrTbox.length; c++) {
var no = new Option();
no.value = arrLookup[arrTbox[c]];
no.text = arrTbox[c];
tbox[c] = no;
}
}

</script>
</body>

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实例演示:jsp+javascript打造级连菜单