Java(jsp) problem....of combobox event

hai here jai.....
i m doing a project in jsp with backend postgresql.......
my problem is.....i hv a combobox where i display department code from database....i hv done this.....now when i select a dept code in the combobox,then there is a textbox on the same page where corresponding ddo code of that dept code will be displayed from the database.....and the dept code and ddo code are 4m the same table of the database.....i can't do this......please help....give me the code in jsp......

Try with the code below...I just implemented teh logic.You have to modify the code accoring to your need...............lemme know if it works or not...........
<html>
<head><script>
function subit(){
document.combo_chk.action='firstpage.jsp?combo='+document.combo_chk.combo.value;
//alert(document.combo_chk.action);
document.combo_chk.submit();
function selit(){
//alert(document.getElementById('<%=request.getParameter("combo")%>').value);
document.getElementById('<%=request.getParameter("combo")%>').selected='true'
</script>
</head><%if(request.getParameter("combo")!=null){%>
<body onload="selit()">
<%}else{%>
<body>
<%}%>
<form name="combo_chk" method="post" action="secondpage">
<%
String value="";
if(request.getParameter("combo")!=null){
//your code will go here..
//dummy value for test
value="edu1,edu2...................";
//End dummy value for test
}%>
<select name="combo" onchange="subit()">
<option value="home" id="home">HOME</option>
<option value="education" id="education">EDUCATION</option>
</select>
empid<input type="text" name="empid" value="<%=value%>">
</form>
</body>
<html>

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[problem with combobox comes infront of popup window|http://forum.java.sun.com/thread.jspa?threadID=5291468]

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Regards
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[problem with combobox comes infront of popup window|http://forum.java.sun.com/thread.jspa?threadID=5291468]

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