Passing vars...JSP resolves faster than javascript - is there a workaround?

HI
The variable/value ("fieldA") that I want to pass from "frame1.jsp" to "frame2.jsp is actually a variable defined javascript function "getTest()" in "frame1.jsp".
I want to pass "fieldA" from "frame1.jsp" to "frame2.jsp"..
"frame2" is initially "blank.html. In the "getTest()" function I use (parent.frames[2].location = "frame2.jsp";) to create frame2.jsp inside of "frame2"
I generat a "post" request (from "frame1.jsp") assigning "fieldA" to a hidden form field ("fldA") in "frame2", and then display the value of "fldA" using "<%= request.getParameter("fldA") %>"...
But the value of hidden form field - "fldA" - is initially "null" because when "frame2.jsp" page is creatd, the JSP scriplets resolve before the javascript "getData" function can resolve. (if I click to post frame2.jsp again, the value shows - but, that's just because the frame2.jsp now exists.)
Is there a work around?.... Or, do I need to have "frame1.jsp" call a servlet to pass "fieldA" ????
Appreciate ANY help on this!!!!
(NOTE -- actually, my real world need will be to assign the value to a Custom Tag parameter, rather than simply display - and that is why I need to get this to work!)
THE WORKING CODE IS BELOW. . . (AGAIN ANY HELP IS APPRECIATED!)
*****frame0.html*****
<%@ page language="java" import="java.io.*, java.util.*" errorPage="error.jsp" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>frame0</TITLE>
</HEAD>
<FRAMESET FRAMEBORDER="2" ROWS="20%,80%">
<FRAME SRC="frame0.html" NAME="frame0">
<FRAMESET FRAMEBORDER="2" COLS="20%,80%">
<FRAME SRC=frame1.jsp?fieldX=<%= session.getParameter("fieldX") %> NAME="frame1">
<FRAME SRC=frame2.jsp?fieldX=<%= session.getParameter("fieldX") %> NAME="frame2">
</FRAMESET>
</FRAMESET>
</HTML>
*****frame1.jsp*****
<%@ page language="java" import="java.io.*, java.util.*" errorPage="error.jsp" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
     <head><title>frame1</title>
     <link rel="stylesheet" type="text/css" href="./standard.css">
          <script LANGUAGE="JavaScript">
               parent.frames[2].location = "blank.html";
               function getTest()
                    var fieldA = "HO THERE!!!"
                    <%
                         session.putValue("fieldB", "HEY THERE!!!");
                    %>
                    parent.frames[2].location = "frame2.jsp";
                    parent.frames[2].getData(fieldA);
                    return;
</script>
     </head>
     <body bgcolor="#FFFFFF" text="#000000">
          <p>
          <h2>
          In frame1.jsp, the value in fieldA is: <%= session.getAttribute("fieldA") %>
          <h2>
          In frame1.jsp, the value in fieldB is: <%= session.getAttribute("fieldB") %>
          <p>
          <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>
*****frame2.html*****
<%@ page language="java" import="java.io.*, java.util.*" errorPage="error.jsp" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
     <head>
     <title>frame2</title>
          <script LANGUAGE="JavaScript">
               function getData(fieldA)
               document.pageData.fldA.value = fieldA;
                    document.pageData.submit();
          </script>
     </head>
     <body>
          <p>
          <h2>
          In frame2.jsp, the value of fieldA: <%= request.getParameter("fldA") %>
     <h2>
          In frame2.jsp, the value of fieldB: <%= session.getValue("fieldB") %>
          <p>
          <div id="HiddenForm">
               <form name="pageData" method="post" action="frame2.jsp" target="_self">
                    <input type="hidden" name="fldA" value="empty">
               </form>
          </div>
     </body>
</html>
*****blank.html*****
<html>
<head>
<title>blank page</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="stylesheet" href="globalview.css" type="text/css">
</head>
<body bgcolor="#FFFFFF" text="#000000">
</body>
</html>
*****error.jsp*****
<%-- error.jsp --%>
<%@ page language="java" isErrorPage="true"%>
<html>
<head>
     <title>error page</title>
</head>
<body>
<h2>Error Encountered: </h2>
<%= exception.toString() %><BR>
<br>
details...<%= exception.getMessage() %>
</body>
</html>

So where to start...
1) session does not have a method "getParameter()" (frame0.jsp) so I don't know how you can get this to work.
2) When you call "javascript:getTest()" the scriptlet is not run again. It's serverside so it is execute on the server then any return data is placed where you have the scriptlet.
3) The scriptlets in "frame0.html" will not work as the page is declared as html.
4) Once again jsp scriptlets (including TagLibraries) are server side components. Any values passed to them should be via a request or session setting on the server side.
For example:
Say we have a tag "myWorkingTag" that outputs the value we assign to "valToUse" on the page.
original jsp document (page.jsp):
<%@ taglib uri="mytags" prefix="mine" %>
<html>
<body>
<mine:myWorkingTag valToUse="xyz"/>
</body>
</html>
The web browser view of page.jsp:
<html>
<body>
xyz
</body>
</html>
You can assign the "valToUse" attribute using <%="xyz"%> (or session.getAttribute() or request.getParameter()) on the server side but ultimately you need to send the value to the server and recompile the page.
I've made some changes to your code (in bold) which is a minor fix but not a solution to your overall objective.
***** frame0.jsp *****
<HTML>
<HEAD>
<TITLE>frame0</TITLE>
</HEAD>
<FRAMESET ROWS="20%,80%">
<FRAME SRC="frame0.jsp" NAME="frame0">
<FRAMESET COLS="20%,80%">
<FRAME SRC=tFrame1.jsp?fieldX=<%= request.getParameter("fieldX") %> NAME="frame1">
<FRAME SRC=tFrame2.jsp?fieldX=<%= request.getParameter("fieldX") %> NAME="frame2">
</FRAMESET>
</FRAMESET>
</HTML>
***** frame1.jsp *****
<%@ page language="java" import="java.io.*, java.util.*" errorPage="error.jsp" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head><title>frame1</title>
<link rel="stylesheet" type="text/css" href="./standard.css">
<script LANGUAGE="JavaScript">
//parent.frames[2].location = "blank.html";
function getTest()
var fieldA = "HO THERE!!!"
<%session.setAttribute("fieldB", "HEY THERE!!!");%>
parent.frames[2].location = "frame2.jsp";
parent.frames[2].getData(fieldA);
return;
</script>
</head>
<body bgcolor="#FFFFFF" text="#000000">
<p>
<h2>
In frame1.jsp, the value in fieldA is: <%= session.getAttribute("fieldA") %>
<h2>
In frame1.jsp, the value in fieldB is: <%= session.getAttribute("fieldB") %>
<p>
<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>
*****frame2.jsp*****
<%@ page language="java" import="java.io.*, java.util.*" errorPage="error.jsp" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>frame2</title>
<script LANGUAGE="JavaScript">
function getData(fieldA)
document.pageData.fldA.value = fieldA;
document.pageData.submit();
</script>
</head>
<body>
<%if(request.getParameter("fldA")!=null){
//this section doesn't make sense, your using the same value twice!?!%>
<p>
<h2>
In frame2.jsp, the value of fieldA: <%= request.getParameter("fldA")
%>
<h2>
In frame2.jsp, the value of fieldB: <%= session.getAttribute("fieldB") %>
<p>
<%}%>
<div id="HiddenForm">
<form name="pageData" method="post" action="frame2.jsp" target="_self">
<input type="hidden" name="fldA" value="empty">
</form>
</div>
</body>
</html>
***** blank.html (obsolete) *****
***** error.jsp unchanged *****
What you should be aiming for is either:
A) Using the above code, send all your required parameters to the form in frame2.jsp and use these parameters to configure the page. As you can see I added an "if(request.getParameter("fldA")!=null)" block to prevent any code from being execute until you send the data.
B) In frame1.jsp, submit it to itself with all the parameters you need and add the objects to the session. When frame1.jsp returns the page to the browser, get it to call a javascript function (<body onload='...'>") to reload frame2.jsp and collect the objects/variables from the session.
Just remember Javascript and Java in JSP's don't exist in the same "world" so to speak. They have to cross a bridge to communicate, the bridge being the action of the form.
Cheers,
Anthony

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hamham3001
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>
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xmlhttp = null
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Technology
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//function
     //----------------------------Well as far as i can see i do not have any issues with it because your code looks
preety much involved with your business logic but one thing i would like to reconfim
here is the variable "xmlhttp" a global one.
if no declare xmlhttp variable as a global variable.
<script language="javascript">
var xmlhttp;
function handleOnChange(ddl){
function verifyReadyState(obj){
function handleHttpResponse() {
</script>
> function verifyReadyState(obj)
if(obj.readyState == 4){
if(obj.status == 200){
if(obj.responseXML != null)
return true;
else
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else{
return false;
} else return false;
}I believe,this is preety much it.
> function handleHttpResponse() [/b]
if(verifyReadyState(xmlhttp) == true)
//-----------HERE!! ---- I GET "UNDEFINED" IN THE
DIALOG BOX
//------- BELOW THE CODE LINE....---
var response = xmlhttp.responseXML.responseText;
alert(response);
it is obvious that you would get Undefined here as responseText is not a property of Document Object or to be more specific to the Object what xmlhttp.responseXML returns.
you might have to use that as alert(xmlhttp.responseText);
and coming back to parsing the XML reponse you have got from the server we need to use
var response = xmlhttp.responseXML.documentElement; property for it...
and if you put as a alert message it has to give you an Output like"Object"
alert(response);
if that doesn't the browser version which you are using may not support XML properly.
var response = xmlhttp.responseXML.documentElement;
removeItems(laProxLista);
var x = response.getElementsByTagName("option")
var val
var tex
var newOption
              for(var i = 0;i < x.length; i++){
                 newOption = document.createElement("OPTION")
                 var er
                 // Checking for the tag which holds the value of the Drop-Down combo element
                 val = x.getElementsByTagName("value")
try{
// Assigning the value to a Drop-Down Set Element
newOption.value = val[0].firstChild.data
} catch(er){
// Checking for the tag which holds the Text of the Drop-Down combo element
tex = x[i].getElementsByTagName("text")
try{
// Assigning the Text to a Drop-Down Set Element
newOption.text = tex[0].firstChild.data
} catch(er){
// Adding the Set Element to the Drop-Down
laProxList.add(newOption);
here i'm assuming that i'm sending a xml reponse of format something below.
<?xml version="1.0" encoding="ISO-8859-1" ?>
<drop-down>
   <option>
        <value>1</value>
        <text>label1</text>
   </option>
   <option>
        <value>2</value>
        <text>label2</text>
   </option>
   <option>
        <value>3</value>
        <text>label3</text>
   </option>
</drop-down>and i'm trying to update both option's value and label which would be something like
<select >
<option value="1">label1</option>
<option value="2">label2</option>
<option value="3">label3</option>
<option value="4">label4</option>
</select>else where if you are interested in getting a format like the one below
<select >
<option>label1</option>
<option>label2</option>
<option>label3</option>
<option>label4</option>
</select> try the below snippet
var response = xmlhttp.responseXML.getElementsByTagName("text");
var length = response.length;
var newOption
for(var i =0 ; i < length;i++){
   newOption = this.document.createElement("OPTION");
   newOption.text = response.childNodes[0].nodeValue;
// or newOption.text = response[i].firstChild.data
laProxList.add(newOption);
Another thing...
I have tried to set the content type inside the JSP
to
response.setContentType("text/html");
AND to
response.setContentType("text/xml");
but none of the above is getting me results......use of response.setContentType("text/xml"); is more appropriate here.. as you are outputting XML or a plain text here...
make sure you set the reponse headers in the below fashoin while outputting the results....
response.setContentType("text/xml");
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 1);
response.setDateHeader("max-age", 0); and if you are serious about implementing AJAX i would advice you start learn basics of XmlHttpRequest Object and more about DOM parsing is being implemented using javascript.
http://www.w3.org/TR/XMLHttpRequest/#xmlhttprequest0
http://www.jibbering.com/2002/4/httprequest.html
http://java.sun.com/developer/technicalArticles/J2EE/AJAX/
http://developer.apple.com/internet/webcontent/xmlhttpreq.html
http://www.javascriptkit.com/domref/documentproperties.shtml
and then go about trying different means of achieving them using simpler and cool frameworks
like DWR,dojo,Prototype,GWT,Jmaki,Back Base 4 Struts,Back Base 4 JSF....etc and
others frameworks like Tomahawk,Ajax4Jsf,ADF Faces,ICE FACES and many others which work with JSF.
Please Refer
http://swik.net/Java+Ajax?popular
http://getahead.org/blog/joe/2006/09/27/most_popular_java_ajax_frameworks.html
Hope that might help :)
and finally an advice before implementing anything specfic API which may be related to any technologies (JAVA,javascript,VB,C++...) always refer to API documentation first which always gives you an Idea of implementing it.
Implementing bad examples posted by people(even me for that matter) directly doesn't make much sense as that would always lands you in trouble.
and especially when it is more specific to XmlHttpRequest always make habit of refering
specific Browser site to know more about why specific Object or its property it not working 4i
IE 6+: http://msdn2.microsoft.com/en-us/library/ms535874.aspx
MOZILLA: http://developer.mozilla.org/en/docs/XMLHttpRequest
Safari: http://developer.apple.com/internet/webcontent/xmlhttpreq.html
Opera 9+: http://www.opera.com/docs/specs/opera9/xhr/
Hope there are no hard issues on this...
REGARDS,
RaHuL

How can I access JSP variables from a JavaScript function in a JSP page?

Respected sir
How can I access JSP variables from a JavaScript function in a JSP page?
Thanx

You may be get some help from the code below.
<%
    String str="str";
%>
<script>
    function accessVar(){
       var varStr='<%=str%>';
       alert(varStr);// here will diplay 'str'
</script>

Accessing JSP variables in Included Javascript

Hey All,
I want to hide my javascript to be viewed on the client browser.
I know we can do that with the javascript include ,But i am using JSP variables in
Included javascript.I can't access those variables any more.
Does anybody know any workarround.
Thanx
Vijay

Hi Vijay,
I am also facing the same problem of hiding javascript in the client browser. My javascript variables are getting initialised on the fly using JSP. Since JSP is compiled on the server side, one can't compile .js file on the client side.
What u can do is to divide your page into frames with
<frameset rows="100%,0%">. Now put your form hidden fields or the .js file in frame 2 which is not visible to the user and then assign your jsp variables in the frame2 html/jsp page. Now access your variables from frame2 in frame1 using
var i = parent.frames[1].document.forms[0].elements[0].value
Assuming that there is 1 form and 1 hidden field in frame2 html/jsp page.
I hope u get the logic rite....
I had done it for application but problem is that our users are real MORONS and they keep doing ctrl+F5 which takes them to the Indexpage.
If you get some other solution then please mail it to my email address
[email protected]
Regards
Vimlesh

Is Mac to Mac faster than Mac to PC?

Someone told me something which doesn't make sense to me, but I could be wrong. Is it true that a website made with my iMac is opened faster than, say Windows PC? This is what the person wrote to me. I don't know how to respond.
She wrote:
*'I know that but when you are working with the same exact equipment it goes faster too doesn't have to convert back and forth. That I know too.”*

Website speed varies by web standards and web browsers used. See my FAQ* on what web standards are, and what web browsers exist:
http://www.macmaps.com/browser.html
Connection speed also varies widely unless you have a dedicated internet line. Not even ADSL is truly dedicated because your upstream is capped and connections on websites are as much a function of upstream as downstream traffic.
- * Links to my pages may give me compensation.

Datasocket localhost faster than network name

When I set my datasocket urls to dstp://localhost/var instead of dstp://machine_name/var the various connections are made MUCH faster. When using localhost, all variables seem to connect instantly, while if I use machine_name instead, it seems to make about 1 connection per second (I'm just watching the led indicator change to green) and so if I have a bunch of variables connecting, it can take quite awhile. I can use localhost on the server machine, however I need to be able to make fast connections on the client machine, and so I have to use machine_name. Is this some inherrent flaw in datasocket? Is there a workaround, or could I have a poor network driver?

Greetings!
"Localhost" does not require any name resolution...it is a "builtin" name in a windows environment. A "real" machine name requires name resolution,which always requires some time. You might try assigning your own machine as the name resolver. (YOu might need to poke around to see what machine on your network is really performing the name resolution.)
Alternatively, use the IP address instead of the machine name.
Just a few suggestions...
Eric
Eric P. Nichols
P.O. Box 56235
North Pole, AK 99705

Is DVD Studio Pro faster than iDVD?

Sorry I'm double posting this but I didn't get my question in the Subject line. Is DVDSP faster than iDVD? If so, by how much? I'm on the endless quest for more speed.

I have a feeling you're asking about the time to compress video, in which case it will depend on the settings you've chosen. As a rough guestimate I would say that iDVD will compress as fast as the faster possibilities in DVD Studio Pro (which is using Compressor behind the scenes). Using Compressor would allow you to more carefully get the best quality for a given amount of video, instead of iDVD's one hour or two hour approach.
Usually though you would tend to compress the video before taking it into DVD Studio Pro, and you wouldn't need to compress it again before doing a build or burning a disc.
If you meant is DVD Studio Pro faster to create a title, it varies depending on what the disc needs to do. The important thing is that there are things you just cannot do in iDVD, and if you need to do those you could use DVD Studio Pro to do them.

Is write mode faster than append mode?

Hi All,
I have to write some data after selecting from a table. I have to call six procedure to write data. Each of the procedure writes around 100-150MB data.
If I generate six files in write mode it takes around 11 minutes. (using utl_file.fopen('/tmp','csv','w');)
but if i generate 1 file (combining all) using (using utl_file.fopen('/tmp','csv','a');) It has passed 55 minutes an size of file is still around 500 MB and still growing.
Can anyone explain why append is so slow comapred to write ? or there is any other reason .. note that we have lot of space on server.
Regards,
Amit

What you've written does not compute.
On my laptop I can write that much data far faster than what you've indicated you are seeing.
What version number?
How is the data being selected?
How much time does the SELECT take without the WRITE?
When I have large amounts of data to write my method of choice is to concatenate them into a CLOB and then write it out using DBMS_ADVISOR.CREATE_FILE
http://www.morganslibrary.org/reference/dbms_advisor.html

Strange AIR performance; == faster than ===

Hi.
I have been hunting down some strange memory usage in one of our games, and tracked it down to numbers being compared to 0.0 in a loop.
I have concentrated the observations down to a small profile snippet.
Observations:
1) I expected the first two profiles to take the same amount of time as everything is typed. But comparing a Number that is a natural is a LOT faster. (only true on desktop and android).
Why is this, is the jitted versions storing Numbers that are natural (whole numbers) as integers, and thus causing a log of type conversion (and memory allocations)?
2) I have been told (and experienced on iOS) that using the === operator is faster than == when a type coercion is possible, test 1+2 vs. 3+4 shows that this is not always the case on some of the platforms.
Is this normal? have I messed up something when building my air apps? If this is reproducible, can somebody with better knowledge of the internals of the AIR runtime explain when it's better to use === over == (for performance).
private var _unused:Number = 0;
private function profileNumberCompare():void
   var t0:int = getTimer();
   _unused += profileEqEqEq(0.1);
   var t1:int = getTimer();
   _unused += profileEqEqEq(1.0);
   var t2:int = getTimer();
   _unused += profileEqEq(0.1);
   var t3:int = getTimer();
   _unused += profileEqEq(1.0);
   var t4:int = getTimer();
   trace(t1 - t0);
   trace(t2 - t1);
   trace(t3 - t2);
   trace(t4 - t3);
private function profileEqEqEq(inc:Number):Number
   var x:Number = 0.0;
   var z:Number = 0.0;
   for(var i:int = 0; i < 10000000; i++)
   if(x === 0.0) z += 1;
   x += inc;
   return z;
private function profileEqEq(inc:Number):Number
   var x:Number = 0.0;
   var z:Number = 0.0;
   for(var i:int = 0; i < 10000000; i++)
   if(x == 0.0) z += 1;
   x += inc;
   return z;
Results:
Desktop, adl (E5530 @ 2.4GHz):
1411
171
68
71
ipad4:
52
53
53
55
nexus5:
1230
373
148
146

Since your iPad is only 4 months old, I'd make an appointment at your local apple store and have them check it out.

Passing vars...JSP resolves faster than javascript - is there a workaround?

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