I have performed the task of doubleselect using jquery and 2 different jsp pages.
My index.jsp has
<script>
function showTeam() {
var e = document.getElementById("project");
var str = e.options[e.selectedIndex].value;
if (str == "") {
//if null the it'll show blank space
document.getElementById("javaquery").innerHTML = "";
return;
}
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("javaquery").innerHTML = xmlhttp.responseText;
}
}
xmlhttp.open("GET", "data.jsp?q=" + str);
xmlhttp.send();
}
</script>
<div class="menu">
<h2>Select the Member and period</h2>
<form>
<table class="veryx">
<tr>
<td>Project</td>
<td><select class="veryx" name="project" id="project">
<option>--Select--</option>
<jsp:scriptlet>try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection con = DriverManager
.getConnection("jdbc:sqlserver://xxx.xxx.xx.xxx:1089;user=abc;password=abc;databaseName=xyz");
PreparedStatement ps = con
.prepareStatement("SELECT pr_iden,pr_name FROM ip_project order by pr_name asc");
ResultSet rs = ps.executeQuery();
while (rs.next()) {</jsp:scriptlet>
<option value="<%=rs.getString(1)%>"
<%=(rs.getString(1).equals(session
.getAttribute("prjct"))) ? "selected" : ""%>>
<%=rs.getString(2)%></option>
<jsp:scriptlet>}
con.close();
} catch (Exception e) {
e.printStackTrace();
}</jsp:scriptlet>
</select></td>
<td>
<button type="button" class="go" onclick="showTeam()">Go</button>
</td>
</tr>
</table>
</form>
<div class="javaquery" id="javaquery"></div>
</div>
my data.jsp has
<%
session.setAttribute("prjct", request.getParameter("q"));
%>
<form action="effort" method="post">
<table class="veryx">
<tfoot>
<tr>
<td colspan="2" align="center" height=""><input type="submit"
class="veryxButton" value="Submit" /></td>
</tr>
</tfoot>
<tr>
<td>Team Member</td>
<td><select class="veryx" name="logn">
<%
String q = request.getParameter("q");
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection con = DriverManager
.getConnection("jdbc:sqlserver://192.168.12.185:1089;user=iPlanClient;password=iPlanClient;databaseName=iPlan_VERYX");
PreparedStatement ps = con
.prepareStatement("SELECT distinct pe_logn FROM ip_dailyeff where pr_iden="
+ q);
ResultSet rs = ps.executeQuery();
while (rs.next()) {
%>
<option><%=rs.getString(1)%></option>
<%
}
%>
</select></td>
</tr>
<tr>
<td>From</td>
<td><input type="date" name="fromDate" /></td>
</tr>
<tr>
<td>To</td>
<td><input type="date" name="toDate" /></td>
<jsp:scriptlet>
con.close();
} catch (Exception e) {
out.println(e);
}</jsp:scriptlet>
</tr>
</table>
</form>