jsp+javascript打造级连菜单的实例代码_javascript技巧

来源：九五美食网

代码如下:
<%@ page import="java.util.Date,yava.fileapp.*,java.sql.*;"
contentType="text/html;charset=GB2312" pageEncoding="GB2312"
%>

function rv()
{
var val="";
for(i=0;i val+=","+combo_box.list2[i].value;
}
if(val.charAt(0)==","){
val=val.substr(1,val.length);
}
opener.form1.frecname.value=val;
self.close();
}

//-->

<%
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);
%>

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 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]);
}
}
}

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jsp+javascript打造级连菜单的实例代码_javascript技巧