Javascript onchange to jsp

i know javascript is client side and jsp is server side and its just not possible to pass parameters or values from one to another but is there a way to work around this?
i have a drop down and in my select
<select name="month" onChange="field.value=this.value;"
        <option value="1">January</option>
        <option value="2">February</option>
</select>
<input type="text" name="field">
//this works just finei want the value in my input type to be placed inside my <%%> to be passed to my bean.
like in...
<%
     int num = //value from the input type which was generated from javascriptt
     JavaBean jb = new JavaBean(num);
%>how is this done?
thanks in advance....

Anjali,
Why do you have to reopen another poster's thread for this ? You can state your problem, refer to this thread and mention that whatever is specified there doesnt work for x or y reasons.
That said, please look at evnaftes reply -
The only way to pass a value from javascript to java is to make an HTTP request sending the value as a parameter, and invoke a new servlet/jsp.
Put the javascript value into a hidden field and submit the form. You can then retrieve the value in java via request.getParameter().
Please understand that jsp is executed on the server and its output is html + javascript which gets executed on the client browser. How can you pass a variable from an output to the program which generated the output and has finished ?
cheers,
ram.

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Passing javascript values to jsp without refreshing the page

Hi,
How do u pass a value of a javascript variable to the jsp without refreshing the page ?
For example, a file called test.jsp in which a javascript variable x contains value 254. I need to pass the value of x to a method declared in test.jsp(same page).

Hi Mona,
when i say refresh i do mean a blink of the browser.
This is a small example i wrote to show you how you can pass javascript varables to JSP variables. If you don't want the refresh to be seen by the user just include this code in a hidden frame on a page and instead of refreshing the entire page, refresh the hidden frame.
i have to say, i didn't test the code so i don't guarantee it's flawless.
if you need an more detailed example just tell me, i'll create one, but it won't be for today :)
<html>
<head>
<title>Log in to the system</title>
</head>
<body>
<script>
//we retrieve the parameter 'user' from the URL
<%
String username = request.getParameter("user");
%>
var user = "<%= username%>";
//check if there is a username in the URL
if(user=="null")
//there is no username so we log the person in as a guest
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//we refresh the page and set the user parameter to 'guest'
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//The parameter can be read by the JSP (see the top op this script).
//This way we gave the javascript variabele to the JSP variable
location="login.jsp?user="+user;
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{ alert("Welcome "+user+", I hope you like this site"); }
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{ alert("Welcome "+user+", I'm glad to see you again"); }
</script>
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how can I access xml document from javascript whithin a JSP page?
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The solution would only work on MS IE browsers, as other browsers do not support an XML DOM.
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How can i assign a Javascript variable to JSP variable

Hi guys
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function submitform1(String s)
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document.form1.action = "../intimation.do";    /* Here i want to pass the value s1 to jsp or servlets without using hidden fields and Query string*/
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Reply
Marimuthu

You don't have the session.
All you have is HTTP.
The only way to communicate from the client to the server is via an HTTP request. The only way to send a value like that is with a parameter.
Using a form with method="submit" as mentioned will pass the parameters without displaying them in the url bar (is that what you wanted?)

Passing JavaScript value to Jsp

Hi,
Any idea how to pass a value from javascript to jsp page when the page gets load on browser.
I use below code but an event is require to pass the value. Is there any code that pass automatically the value from javascript to jsp.
<html>
<head>
<title>Passing Javascript value to Jsp</title>
<script type="text/javascript" language="javascript">
var scriptVar = "Noy"
var WinNetwork = new ActiveXObject("WScript.Network")
document.write (WinNetwork.username)
document.index.hiddenTextBox.value = WinNetwork.username
</script>
</head>
<%
String jspVar = null;
if(request.getParameter("submit") != null){
jspVar = request.getParameter("hiddenTextBox");
out.println("Jsp Var : " + jspVar);
%>
<body>
<form name="index" onSubmit="index.jsp" method="post">
<input type="hidden" name="hiddenTextBox"><br>
<input type="submit" name="submit" value="Submit">
</form>
</body>
</html>
Thanks,
~ukbasak

JSP/Java runs at the server side, produces a HTML page, sends it to the client side and then stops running.
HTML, containing under each CSS and JS, arrives at the client side and runs at the client side only.
To invoke JSP/Java using HTML you need to fire a request to the server side. That can be either a plain vanilla <a> link, a <form> to be submitted or an asynchronous Ajaxical request.
That said, the use of ActiveX in web applications is discouraged. It's a Microsoft IE proprietaty. With other words, it isn't and won't be supported by all alternative browsers which the other half of the world is using.

How to pass javascript variable to jsp function

i want to check which table header (that is <th> in html )is clicked and based on that a jsp funtion do a query in database and should show records in sorted way according to which column head is clicked.
Table is created in html.
My function is
Vector varray = workcaseid.getWorkcaseId(Long.parseLong(MasterAccountNumber),SelectedColumn);
<table border="1">
<th ><label onClick="<%SelectedColumn="workcase_id";%>">Workcase Id</label></th>
<th><label onClick="<%SelectedColumn="status_id";%>">Status</label></th>
<tr><td>etc</td></tr>
</table>

im using bean for business login, following mvc model,and i think mvc is one of good design practice to use.
<jsp:useBean id="workcaseid" scope="session"class="beanFiles.SearchWorkcaseId" />
varray = workcaseid.getWorkcaseId(Long.parseLong(MasterAccountNumber),SelectedColumn);
just tell me whether it is possible to pass javascript variable to jsp variable or not.i can do it by using hidden input type,using form and submit button.

How can we use java variable in javascript code on JSP page?

How can we use java variable in javascript code on JSP page?
Pls help

Think about it:
JSP/Java is executed on the Server and produces HTML+JavaScript.
Then that HTML+JavaScript is transfered to the client. The client now interpretes the HTML+JavaScript.
Obviously there's no way to access a Java variable directly from JavaScript.
What you can do, however, is write out some JavaScript that creates a JavaScript variable containing the value of your Java variable.

I want to assign the value of a Javascript variable to JSP Variable

I want to assign the value of a Javascript variable to JSP Variable .. for example :
<%
Bla Bla Bla
%>
<script>
var JavaScriptVariable="hello"
</script>
<%
String JSPVariable=// The Value of JavaScriptVariable ;
%>
How can i do that ??
Thanks

>I want to assign the value of a Javascript variable to JSP Variable
cannot be done.Friend try to understand concepts properly Javascript is always excuted by the browser @clientside where as JSPCode is executed Websever(ServletContainer) @serverside.Through you are combining JSP Code blocks(Tags,Expressions,scriptlets...) & javascript under a single page webserver can only identify what is their under JSP Code blocks.
Hope this could be an appropriate answer for your question.
However,you can as well submit a request by encoding your URL with request parameters and the submit to the page and then collect it using request.getParameter(name).
But under a single context state it is not possible
REGARDS,
RaHuL

Passing JavaScript values to JSP variables

Can any body correct the follwing code
<Script language="JavaScript">
function test( x )
<%
int num = x;
num = num * 2;
%>
v.value = "<%out.print(num);%>";
<input type="button" name="b" value="test" onClick="test(5)">
<input type="text" name="v" value="0">
In short, I am trying to pass JavaScript value to JSP variable. I hope that it is possible to do that. If it is possible then how can I do it. I want to assing the variable x passed to the JavaScript function called test to the JSP variable called num.
Regards,
Ageel

Thank you for your reply,,,
I think then the only way to do it is to post the
value on the server and then use request.getParameter
method in jsp code
but the question now how can I post values to the
server using JavaScript without reloading the pageyes... you can to it by create a new popup window which will submit the value to server after page was loaded... then, server return a value to the same window in html/jsp page which then using javascript to set it back to the opener and close up the window... however, this is not a good choice unless you have no other alternative...
>
There is other possible solution
if I can get the text field value from the same page
without reloading it that would work fine and will
solve my problem, is it possible?yes... you can get the value from the textfield...
for example :
function showValueInTextField()
alert(document.forms[0].elements["mytextfieldname"].value);
>
My final question> can jsp change things on the same
page without reloading it. I mean can it work like
JavaScript so that I can use it's internal functions
instead of using java script :S
not really know what you trying to say here...

How can I assign javascript variables to jsp or java variables.?

How can I assign javascript variables to jsp or java variables.?

See I have generated some variables in the javascript which is on the jsp page. I want to assgin these variables to the jsp vaiables. Or how can I access javascript variables from jsp on the same jsp page.

Get javascript variable in JSP

Hi all,
can anybody tell me- how to get javascript variable in JSP,
in the same file (JSP).
Is this possible.
I can use JavaScript to get the value,
but then I have no way to get that to the JSP code.
Please give the appripriate answer with code.
Thanks
amitindia

Hi all,
Thanks for your quick response.
So u are right that we can not call javascript variable
in the same JSP. and pass them to the bean class.
So what I did --- I get java script variable in another JSP using
request.getParameter(); and then redirected to previous JSP.
and I have solve my problem.
Actually I had to call bean class and pass varible to the bean
method but I was getting the same problem that I disscussed but now it
has been solved.
Thanks again for participation
amitindia

Setzen Fokus �ber JavaScript im CnC-JSP-Workflow-Framework

Anleitung Setzen Fokus �ber JavaScript im CnC-JSP-Workflow-Framework
Auf der JSP-Seite muss zum Setzen des Focus auf ein
FORM-Feld folgender JavaScript-Code (hinter der Form </form>)
<script language="JavaScript" type="text/javascript">

</script>
eingef�gt werden.
Dies wird durch das CnC-Custom-Tag
<cnc:setfocus elemName="date"/>
erledigt (siehe SetFocusTag.java).
Es benutzt entweder das optionale Attribut
elemName="date"
oder den auf dem SessionKey CNC_FOCUS hinterlegten
Form-Element-Namen, wobei der SessionKey Vorrang hat.
Nach dem Erzeugen des JavaScript-Codes l�scht das
SetFocusTag.java den Session-Wert auf dem Key
CNC_FOCUS (message consumed).
Im Fluss-Steuer-Script flow.cnc kann der Name des zu
fokussierenden Form-Elementes mit
session.CNC_FOCUS := "date";
gesetzt werden.
Bei indizierten Formularen (Tabellen) ist der Index des zu
fokussierenden Form-Elementes in eckigen Klammern mit zu
�bergeben:
session.CNC_FOCUS := "txt[" + cnc_button_index + "]";
Es d�rfen keine Leerzewichen, f�hrende Nullen oder Dezimalstellen
auftauchen.
Hier besteht eine Abh�ngigkeit zur internen Arbeitsweise des CnC-
Frameworks. Der Einfachheit wegen habe ich diese L�sung f�rs
erste gew�hlt.
Heiner Kuecker
Internet: http://www.heinerkuecker.de http://www.heiner-kuecker.de
JSP WorkFlow PageFlow Page Flow FlowControl Navigation: http://www.control-and-command.de
Expression Language Parser: http://www.heinerkuecker.de/Expression.html

Ich spreche nicht Deutch! :-P

Javascript problem in jsp

my jsp is as:
<select size="1" name="Bookcode" id="fp8"   onchange="onCall()" style="border: 1px solid #000080">
<option value1=<%=btdto[0].getBookIssueDate()%>
                             value2=<%=btdto[0].getBookRenwDate() %>>
                             <%=bCode%>
                     </option>
</select>
my javascript is as:
function onCall()
                    var idate=document.book_renewal.Bookcode.options[document.book_renewal.Bookcode.selectedIndex].value1;
                    var rdate=document.book_renewal.Bookcode.options[document.book_renewal.Bookcode.selectedIndex].value2;
                    alert("idate");
                    document.book_renewal.idate1=idate;alert("rdate");
                    document.book_renewal.idate2=rdate;
               }it is giving alert("idate"), but giving alert("rdate")
i am getting an error in javascript as:
Object does not support this method or property
please resolve
thanks

If not specified, the <select> dropdown is single selection. If you want, try set multiple="true" in the select tag. If it is single selection, then the selection.selectedIndex should only have one value. If it is multi-selection, the I assume the selection.selectedIndex will return you an array of items.
Hope this helps!

Passing Javascript values to JSP

Hi,
I have a select box and i get the selected value using the javascript. The variable that stores the value should be passed to the JSP. I need to know , how i an do the same.
When a user clicks on a option I call a javascript function:
function myFun()
var text = document.myform.selectboxname.options[index].text;
return text;
I need to get the value returned.
The select option is as follows.
<select name="sel" multiple onChange=myFun()>
How can i get the value "text".
Kindly help.

if yes.....my functions returns a value...how can i
access the same.You can't, in the way you want it. You need the function to put the value where it's supposed to go.
I'm sorry, but this question is clearly out of scope for this board. Look for a Javascript support forum. Just the fact that the HTML originated from a JSP doesn't make it a Java question.

Need a fast answer... passing javascript variable to jsp page (how to use)

This test application has 3 frames.
I'm assigning a value "stuff" to a variable ("testfield1") in a javascript function ("getTest") that exists inside an html frame (testpage1.html)
Then, I click on the "test submit" hypertext link to pass the value of "testfield1" to the JSP frame (testpage2.jsp) by invoking a function ("getData") in "testpage2".
In function ("getData"), I am passing the variable "testfield1" as a parameter to the "getData" function in "testpage2".
In "testpage2" - in the ("getData" function) I try to assign the value of the variable "testfield1" to another variable called "testfld1".
Then, I try to extract the value of "testfld1" into a variable called "tstfld1" in a JSP scriptlet
....I.E. [ String tstfld1 = request.getParameter("testfld1"); ]
But, the value is apparently not passed successfully, as tstfield1 appears to be "null".
Can anyone explain what I'm doing incorrectly?
The code for this test app is below...
********testpage0 - the parent frame*********
<HTML>
<HEAD>
<TITLE>GlobalView Reports and Trending Menubar</TITLE>
</HEAD>
<FRAMESET FRAMEBORDER="0" ROWS="15%,85%">
<FRAME SRC="testpage0.html" NAME="testhtmlparent">
<FRAMESET FRAMEBORDER="0" COLS="23%,77%">
<FRAME SRC="testpage1.html" NAME="testhtml">
<FRAME SRC="testpage2.jsp" NAME="testjsp">
</FRAMESET>
</FRAMESET>
</HTML>
*******testpage1.html********
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<html>
     <head><title>testpage1</title>
     <link rel="stylesheet" type="text/css" href="./standard.css">
          <script LANGUAGE="JavaScript">
          parent.frames[2].location = "blank.html";
          function getTest(reportType)
               testfield1 = "stuff";
               alert("testpage1.html...testfield1=" + testfield1 + ", reportType=" + reportType);
               parent.frames[2].location = "testpage2.jsp";
               parent.frames[2].getData(testfield1);
               return;
          </script>
     </head>
     <body bgcolor="#FFFFFF" text="#000000">
          <form name="reportRange">
               <center>
                    <fieldset style="padding: 0.5em" name="customer_box">
                    <table cellpadding="0" cellspacing="0" border="0">
                         <tr class="drophead">
                              <td valign="top" height="0" ><span class="drophead">
                                   test submit
                              </td>
                         </tr>
                    </table>
                    </fieldset>
               </center>
          </form>
     </body>
</html>
*******testpage2.jsp*********
<%@ page language="java" import="java.io.*, java.util.*" errorPage="error.jsp" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<html>
     <head>
     <title>testpage2</title>
     <script language="JavaScript">
          function getData(testfield1)
               alert("testpage2.jsp...testfield1=" + testfield1);
               document.pageData.testfld1.value = testfield1;
               document.pageData.submit();
     </script>
     </head>
     <body>
          <%
               String error;
          %>
          <div id="HiddenForm">
               <form name="pageData" method="post" action="testpage2.jsp" target="_self">
               <input type="hidden" name="testfld1" value="0">
          </form>
          </div>
          <%
               String tstfld1 = request.getParameter("testfld1");
          %>
          <P> testfld1 = <%= tstfld1 %> </P>
     </body>
</html>

parent.frames[2].getData(testfield1); is in testpage1.html
so in the document.pageData.testfld1.value = testfield1; document = testpage1.html( not testpage2.html)
modifying the getData to accept the document object, and refering this object to parent.frames[2].document may help you.
good Luck ....

Javascript onchange to jsp

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