in JSP, it's easy to pass value from java-variable to
javascript-variable, like
js_function(a)
{ a=<%java-class.A%>
}
I'm wondering how is the other way around? I tried
js_function(a)
{ <%java-class.A=%>a
}
but there was compiling error.
how can I pass the value from the drop down menu to the javascript function, I'm using the onChange event.
Like: <select name = name onChange="selectName()">"
In a JSP, I try to pass a Java object to a javascript function, like this:
<%
Test test = request.getSession().getAttribute("test");
//Test has a field of lasName, such as test.getLastName() will return "john"
%>
//This is for simplizing. In reality this js codes are in different file such as includeFile.js
<script>
var obj = <%= test%>;
[Code]...
I had a problem with my previous approach in javascript so i thought of another strategy, to work with java. How can i pass the DOM of the current web page that is the HTML page to java, so that i can parse the DOM and i need to extract the internal contents of the script tags in the page and evaluate them apart from running in the webpage.
How can i pass the dom object to java and evaluate the scripts contents from java.
Can Java classes/objects be used from within the javascript code on the
HTML page? I.e., can I call a Java method from the javascript function?
Is DHTML a language? or is it a composition of JavaScript and css? Does Java(not javascript) has something to do in it?
What is actually the best to create client-side dynamic pages?
I know JAVA is used to create applets but I am not sure of wich is the most powerful....
Also, wich are the newer versions of all the above languages?
I am a XHTML/CSS developer with an interest in AJAX. I am at the stage were I wish to learn how it's all done.
So my quesiton is this:
To develop AJAX applications do I need to learn JAVA or Javascript?
It may sound like a dumb question considering AJAX is mainly javascript and XML, however will learning JAVA first off be a benefit?
I am trying to call a java method from within my Javascript, but cannot
seem to get it to work. All the examples I have found online and in
the forums are using Java applets. I have a method that I want to call
that does a search, and produces a message dialog displaying the
results. Also, the class file lives next to the html file. How would
I invoke this in my code? This is what I have now:
<script>
function searchStrings(){
Searcher.search();
}
</script>
<form>
<input type="button" value="Search" onclick=searchStrings()>
</form>
This may be more of a Java question, but I feel that JavaScript experts
may be more qualified to help me find a solution.
In short: is it possible to call a Java method from JavaScript, passing
as an argument a JavaScript array (in my case, an array of doubles)?
Supposing I have array x containing only doubles, I have tried:
document.MyApplet.myMethod(x);
But the method only ever seems to receive "null" as an argument.
Conversely, if I try this with a String, or a single character, or
almost anything else, there isn't a problem. Any ideas?
let's me explains my long problem:
I'm doing an intranet with a media part. So im must be able to upload files on
a ftp server AND have a record of informations about this file and meta date in
a MySQL database, shown in a php page.
So the first thing i was doing was:
1/ * A HTML Form, with a <input type="file"> which was uploading the file to
the web server. And then, in the next action-php-page, using ftp functions from
php to upload to the ftp server. But this make upload the file 2 times, which
slow, and the user can't do anythig except waiting in front of a blanck loading
page.
=> no way
(BTW, the site admin refuse that the ftp server and the web server to be the
same computer)
So i tried something else:
2/ * A HTML form, the user enter meta data about the media, click next, and
then, a php page which loads a java applet an pass informations to it (by param
tags).
The applet have a browse button, and a go button, which start the transfert
(JDK 1.4.1) trough the URLConnection. The file is uploaded once, and there is a
progress bar, which is wonderful.
But now, i need the src_file information wich is the java applet. So i have two
options:
A/ I make a post to the webserver from the applet. But i'm using session
identification (needed for tracing users actions) and i'm gonna use SSL in less
than one month, so i think it would be complicated.
B/ I export the information from the java applet to javascript, and then to
HTML hidden field, so that the user can submit the full-hidden-filled form. But
i can't make LiveConnect works.
i'm under Mac OS X 10.2 (jaguar) so i need to make work LiveConnect on both
Safari 1.0 (v85.6), mozilla 1.5, and Mac OS IE (5.2).
Can you call a java class from within a javascript?
View 1 Replies View RelatedA Java applet has two methods stop() and destroy() that get called when the user moves to a different page. Does javascript have anything similar?
View 2 Replies View RelatedI am writing a java application as a mozilla extension.
Because mozilla uses javascript for the frontend,
i need the javascript to call my external java application
and pass one parameter to it.
Can anyone help me how to set default website as homepage in mozilla using java/ javascript.
Following javascripts code works in IE but not in Mozilla.
<input type="button" value="Set Default" onClick="this.style.behavior='url(#default#homepage)'
this.setHomePage('http://www.myDefaultWebsite.com')">
I am looking at a client’s site that has a scrolling text bar at the bottom of the page for latest news. I have been asked to recommend whether they keep the scrolling text as a java applet or whether they make it dhtml with Javascript to make it scroll.
To be honest, I’m not sure whether there really is an important difference, in terms of download time, likelihood of working (if client browsers are better enabled for one verses the other), or whether there are any other reasons one should be used over the other.
I would like to have my javascript pass some variables it gets to a php
page I have to log the inputs. The inputs are collected in forms but I
want the logging to be completely hidden from the user. Any
suggestions?
I have an easy question, likely, that has me in a headspin. I have an
include file to a frames based site that basically forces frames on
the end user if they visit the site and hit a non-frames created
page...
Simply, it is:
if (parent != self)
self.parent.location.replace("/");
However, now I would like to force an inner frame to populate based on
what frame someone was redirected from the include (above). So, if I
visit http://domain/frame/innerframe_3.html, then I want to redirect
to the above, but pass in /frame/innerframe_3.html to be included as a
URL parameter for an inner frame to be populated.
When I modify this link to:
if (parent != self)
self.parent.location.replace("/index.php?redir=" & location.href);
Then, the replaced location doesn't seem to recognize the ?redir=
portion of the new location.
Is there a different way to do this? I can't use a META tag because I
want the TARGET to be _TOP, basically.
i had write my code by using php language and i would like to pass in an array that generated by using php programming language from a select box through the onchange method.
i had try it but it cant be pass in. how should i code it?
I have a multiple select list box that gets its values using mysql+php. What I'm trying to do is pass the selected value as a variable into flash with the onChange event.
View 3 Replies View RelatedI was wanting to build a javascript error checker function for several forms.
Because each form has different inputs (ie, text, radio, select) i'm trying to figure out a way to pass some dynamic data to the function.
The way i'm currently doing it is by passing a long string to the JS function and then tokenising it into element names. However this is going to get very messy ....
I was thinking that, using PHP, i could build a list of the objects to be checked.
Is it possible to pass a PHP array to a Javascript function ...
So i've got in PHP
$array= {field1,field2,field3}
Which i want to pass (in a some manner)
<form name = 'formName' onsubmit='errorChecker(formName, $array)'
I am using asp.net to pass parameters from .aspx page to my Microsoft
reporting service.
My .aspx page has checkbox. If it is checked it the chekbox should pass
value =0 to my report
<INPUT id="ReviewedBy" style="WIDTH: 16px; HEIGHT: 20px"
type="checkbox" name="ReviewedBy" value = 0>
if the check box is unchecked it should pass value = 1. i.e.
<INPUT id="ReviewedBy" style="WIDTH: 16px; HEIGHT: 20px"
type="checkbox" name="ReviewedBy" value = 1>
Since the reporting service passes value directly i couldn't write any
server side code.
In client side validation i could diplay the value of check box in
alert message but i couldn't pass it as parameter to the report server.
I'm not sure whether or not this is possible, but I want to have control over the Javascript function that is called when a target web page is opened (ie as the onload function in its <body> tag). In other words, the calling page will have several <a href ...> tags referencing the same page, each specifying a different onload function. Is it possible to effectively pass a parameter in this way? I have not been able to find any solution to this.
View 2 Replies View RelatedI have been trying to grasp the whole 'Pass By Value/Reference' thing for a few hours now. From what i can make out:
Passing by value will make a copy of the value, pass it as a function argument and the function will store the changes, the original value is not affected. So for example:
JavaScript Code:
var cost = 145;var postage = .3;var a = function() {return cost + postage;} //Using an Anonymous function for this
If you was then to pass the value of 'a' to a function argument it would copy and not change the original value.
If you pass by reference it will change the original value. When you pass a reference to a value through a series of different functions and the value is constantly being changed the change happens on the original value and can be seen outside the function.
The problem is i cannot think of how or why this would be used. I havn't got to develop many large applications so im trying to think of a few situations when passing by reference would be used.
I have a bunch of .js files that I insert into my my html file using
the <script> tag, and this works just fine. The .js files contain
info about the menu, table set up, etc. and take care of the page
format.
But now, I have a tidbit of Javascript in an htm file, and this tidbit
opens up a new window with some information on it. I want to insert
all of the menu and format javascript files on this new window that it
opens. so, my question is: how would I do this: (since this doesn't work!)
output.document.write('<SCRIPT language=JavaScript
src="/scripts/menu_array.js" type=text/javascript></SCRIPT>');
Anyone know a good site that'll teach you how to make a drop-down navigation
bar? I assume it is javascript
I have a drop down field that is dynamically populated using an XML sheet that looks like:
Code:
I populate the dropdown box using javascript that looks like this:
Code:
My the drop down form looks like this:
Code:
When a user clicks on the drop down box, all of the values inside "<title>" tags get displayed. Once the user has made their selection, the form is submitted and posts the user's option. My problem is that when the user clicks on the drop down box, I want them to see the content included in the "<title>" text but I want the form to post the data included in the "<xml>" tags.
For example, if the user clicks on the drop down menu and selects the option 'Animals' I want the form to post 'xml/animals.xml'. Any ideas how to handle this?