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Create a cascading menu Using jsp + javascript

Source: Internet
Author: User
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<% @ 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 (); // data connection Bean instance
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 ();
Rs1_stmt.exe cuteQuery (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; // initialize the length of the 2nd-level menu. The subscript starts from 0.
Var I = 0;
Document. combo_box.city.options [0] = new Option (-------,);
For (I = 0; I <temp; I ++ ){
If (arr [I] [1] = id) {// if they are equal, it is proved that there is a subset of the 2nd-level organization input in level 1st, and arr [total number] [Department]
Document. combo_box.city.options [document. combo_box.city.length] = new Option (arr [I] [0], arr [I] [0]);
}
}
}
</Script>


<Form name = "combo_box">
<Table border = "0" cellspacing = "0" cellpadding = "0" height = "210" width = "59">
<Tr height = "24">
<Td bgcolor = "#336699" class = "buttons" align = center> <font color = # ffffff> select a department </font> </td>
<Td bgcolor = "#336699" class = "buttons" align = center> <font color = # ffffff> name selection </font> </td>
<Td bgcolor = "#336699" class = "buttons" align = center nowrap> <font color = # ffffff> Add/Remove </font> </td>
<Td bgcolor = "#336699" class = "buttons" align = center> <font color = # ffffff> final person </font> </td>
</Tr>
<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"> select a department ---> </option>
<%
String sqld = "SELECT * FROM tdept ";
Stmt = conn. createStatement ();
Rs1_stmt.exe cuteQuery (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 = "selected! "Onclick =" rv (); "> </td>
</Tr>
</Table>
</Form>

<Script language = "JavaScript">
// Move a person's name
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>


This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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