Dynamically Adding Javascript Functions On The Fly?
Apr 1, 2006
Might there be a way to add a set of Javascript functions to a display page's existing set of Javascript functions on the fly without reloading the display page, and if so, how?
A couple of approaches I have tried, but without success are:
- A) For an embedded "retriever" IFrame in the display page to retrieve a set of JS functions from the server and then on its "onload" transfer (by innerHTML transference) that set of functions into the parent display page.
- B) Similiar to "A" but to use regular old browser frames - one being the "retriever" and one being the display page.
- C) Using a JS function in the display page to make a http request for a supplementary .js file(s).
Please note: the goal is to retrieve *only* an additional set of Javascript functions from the server, and then add them to an "original" set of functions already loaded into the browser. Meaning, NOT - say - for an IFrame to download from the server *both* the additional set and again the "original" set, which the parent display page could then run directly from the IFrame.
After "A", "B", and "C", I'm at a loss for further ideas.
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Dec 7, 2002
I'm currently looking at data-piping ie making server calls without reloading the page, the server returning some data to a cookie and the calling page using that same data on the page using DHTML. So far so good...
But is it possible to actually use javascript to actually write more javascript onto the page? Or, alternatively, is it possible to dynamically add a call to an external javascript file.
Something like...
document.writeln('<script src="script.js")
The idea being that the server could return functions for the calling page to use, which would be very nice for complex web applications.
If you can do this, what issues do you need to be aware of?
If you can't, are there any ways of achieveing the same things? I'm thinking of things like dynamically adding a scriptlet call to the page in Windows IE, though a more cross-browser solution would be cool.
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Nov 2, 2004
My client wants to upload multiple files to the server using the FILE type input of the form. Their requirement says that once they click the browse button of the FILE INPUT type , besides file browsing window another FILE FIELD is added at the bottom of this one. and when the user clicks the browse button of second, it adds another until the user clicks the UPLOAD button to submit the form.
I dont know it is possible or not ???? if yes then please tell me how.
The alternate way is to give drop down menu with number and when the USER chooses certain number then ..that amount of FILE FORM FIELDS will be added. i.e if user chooses 3 then three file fields are there to upload 3 files at a time.
I have written a script that i am pasting here, but when i choose the drop down menu and select value the FILE FIELDS are shown but the original drop down menu vanishes..
Please review my code and modify it or refer some script to me.
IF The first choice is possible, i mean adding each FILED by browse button click , then tell me its code, other wise modify this code that i am pasting or give me some link to download a premade script. Code:
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Apr 23, 2011
$(something).split(something),this is a function with a function as a property for that function.
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Oct 26, 2011
I thought about following code snippet code...
Has anyone an idea, if my thoughts on that are correct oder if this behaviour could be a problem?
And is there probably a better way to combine functions, so that all functions would be in one column?
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Oct 4, 2010
:confused: when user clicks submit first it should check to see if a name from the dropdown has been selected then it should check to make sure all radio buttons were selected. code to check if a name was selected in the drop down.
<script type="text/javascript">
window.onload=function(){
document.forms[0].onsubmit=function(){
[code]....
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May 24, 2010
Is there a way to make 2 functions load at the same time using window.onload? I have to seperate functions which rotate images, then another that rotates text.Functions:showQuote()iAnimate()
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Jul 20, 2005
Given an expression f = ƈ*x+3' from a user input I would like to do some sort of:
function userFunction(x):
return f(x)
is it possible with Javascript?
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May 11, 2011
I have a page where I dynamically add functions to links. I want the links to pop up with the index values, why does it alway popup with 5? I expect 1,2,3 or 4.
See code below:
<html><body>
<ul>
<li><a id="mylink1" href="select">Link 1</a></li>
<li><a id="mylink2" href="select">Link 2</a></li>
<li><a id="mylink3" href="select">Link 3</a></li>
[Code].....
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Oct 27, 2011
i thought about following code snippet:
Code:
var newfunc = function() {
//...
}
[Code].....
Has anyone an idea, if my thoughts on that are correct oder if this behaviour could be a problem? And is there probably a better way to combine functions, so that all functions would be in one column?
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May 6, 2009
I have a table that i load into the document via ajax. the table shows a list of times. every row has a button that when clicked should call another AJAX function. However when clicking the link nothing happens. If I put a link in the original document myself and ask it to do this, it works fine, but becuse this is generated code, this option will not do.
THis calls for the table.... works fine...
$(function () {
$("#departmentToSchedule").change(function () {
$.ajax({
url: "schedjewelAjax.php",
[Code]....
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Jul 12, 2009
I'm trying to learn more about creating and using JavaScript objects and ran into this situation the other day:
Code:
function someObject() {
var size = "large";
[code]....
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Jul 25, 2011
Our app handles all users information via AJAX using jQuery. We return data.success or data.error depending on if it the API works or not. We also run the jQuery error() function on each post() just in case there is an actual problem reaching the server. It's getting tedious having the same thing for all of them.Here's a simplified example:
$.post('/api/nodeSave.php', {
net: true
}, function(data) {
[code]....
is there any way to add the trailing error() function as a default to all post() functions we run so I don't have to include it every single time?
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Mar 10, 2010
I have table in Javascript and it has addrow, deleterow, submit, and functions. when i click it automatically adds new row and it has select option to choose some of them for ex. in added two rows one of them is Motherboard Asus and other is Motherboard Gigabyte.
What i want is when i choose motherboard Asus it added news row with select option Motherboard asus and disabled select option and second time when i click add button let it adds rows but among select options let it ejects Motherboard ASUS. and with this way at the last there will be no options to select
Here is my code:
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Oct 1, 2010
I need to be able to display dynamic HTML inside a DIV (can't tell what the html nodes would be) - i.e needs to be flexible. The HTML that goes inside the DIV would have its own Javascript too. I was able to get this code snippet working on Microsoft IE7+, was wondering why the same won't work on firefox.
HTML Code:
<html>
<head>
<script>
/* the input type = hidden is necessary or the JS won't be accessible */
/* script defer tag is also necessary */
function insertHTMLOnButtonPress() {
var s = "<html><input type='hidden' id='dummyHidden'/><head><script defer='defer'>function dynamicallyInsertedFunction() { alert('Successfully called - dynamicallyInsertedFunction'); } </sc" + "ript></head><body><input type='text' value='Hello World'/><input type='button' onClick='dynamicallyInsertedFunction();' value='Call Dynamically Inserted Method'/></body></html>";
/* Clearing out innerHTML is also required to flush the innerHTML so that repeated attempts - i.e new HTML/JS should work */
document.getElementById('wholeBody').innerHTML = '';
document.getElementById('wholeBody').innerHTML = s;
}
</script>
</head>
<body>
<br/>
<!-- Don't close the div inline, causes some problem and replaces the buttons too -->
<div id="wholeBody"></div>
<br/>
<input type="button" onClick="insertHTMLOnButtonPress();" value="Insert some dynamic html"/>
<input type="button" onClick="dynamicallyInsertedFunction();" value="Call Dynamically Inserted Method"/>
</body>
</html>
I have tried a couple of things likeRemove the script defer tag
- Removing the dummy input element added which is required for Desktop IE
- Removing the empty innerHTML step before replacing it
But none of these appear to work for Mozilla firefox. I am also looking for a similar behavior on Android's default webbrowser (WebView to be more specific) -- Doesn't work there too.
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May 26, 2010
how I would dynamically add another table once text fields in the existing table is clicked on.So pretty much what I have is a table with 5 textboxes lined up horizontally in the first row along with couple of buttons in the second row.What I want is that once one text box is clicked, another table like the one above is created and appears below that initial table. So this is the inital table that should be replicated on each click:
Code:
<table>
<tr>
<td><input type="text" /></td>
[code]....
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May 1, 2009
I'm trying to add a script tag dynamically to the head of DOM of course without any success...this tag should use the google search api if only it worked...
var head = document.commandDispatcher.focusedWindow.document.getElementsByTagName("head");
var s = document.createElement("script");
s.type = "text/javascript";
[Code]....
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Oct 1, 2010
I am adding a div tag dynamically and depending on the #id, I want to highlight it a different way. How do i get it to recognize the new div tag on an action that normally happens on page load.
My understanding is .live only works with events and there is no event in this case, is there?
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Oct 12, 2010
Demonstration code:
The 'array' variable contains strings representing the id's of different elements. If the for loop above were to finish iterating, would all the links in all three elements call the click function (that displays an alert message), or would only the last element ("element3") have the click function? For me, the latter seems to be the case unless if I'm doing something wrong, but I would like clarifications and, if possible, alternative solutions as to how I can achieve the former result.
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Jul 23, 2005
I'm working on some code and am running into brick walls. I'm trying
to write out Javascript with Javascript and I've read the clj Meta FAQ
and didn't see the answer, read many similar posts (with no luck
though), and searched through the IRT.ORG Faqs
(www.irt.org/script/script.htm).
The Javascript is designed to open an popup window and then inside that
window call another script which will resize that window. There may be
another way around this but the reason I tried this approach initially
was that I wanted to call the onload handler in the popup window to
resize the image only after the image had completely loaded. I've had
some code in the primary Javascript file (showimage.js) before that
works if the image has been cached but on the first load, it doesn't
resize properly which tells me it is probably because it is trying to
resize the window based on the image size but it isn't completely known
at that point. So I removed that code and tried placing the resizing
code in the second Javascript file (resizewindow.js). BTW I've tried
other code to open a popup image and automatically size it ie Q1443 at
irt.org but that doesn't do exactly what we need.
Even if there is another way to do this with one file, I still want to
figure out why this isn't working in case I run into it in the future.
I thought what I would need to do to use document.writeln to write
Javascript would be to escape any special characters and to break
apart the script tag ie
document.writeln('</SCRIPT>');
would become
document.writeln('</SCR' + 'IPT>');
I have a HTML page and 2 Javascript files. All files are in the same
directory and have permissions set correctly.
Here are the 3 files (keep in mind wordwrap has jacked up the
formatting):
index.html
----------
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Test</title>
<SCRIPT type="text/javascript" LANGUAGE="JavaScript1.1"
SRC="showimage.js">
</SCRIPT>
</head>
<body>
Click the house<BR>
<A ONCLICK="newWindow1('house1.jpg','Nice House')"><IMG
SRC="house1thumb.jpg"></A>
</body>
</html>
showimage.js
------------
function newWindow1(pic,sitename)
{
picWindow=window.open('','','width=25,height=25,sc rollbars=1,resizable=1');
picWindow.document.writeln('<html> <head>');
picWindow.document.writeln('<SCR' + 'IPT type="text/javascript"
LANGUAGE="JavaScript1.1" SRC="resizewindow.js"></SCR' + 'IPT>');
picWindow.document.writeln('</head>');
picWindow.document.writeln('<body onload="resizewindow();">');
picWindow.document.writeln('<img src=' + pic + '>');
picWindow.document.writeln('</body> </html>');
picWindow.document.close();
}
resizewindow.js
---------------
function resizewindow()
{
// Do resizing here.
// Right now this isn't being executed
alert("resizing window");
}
Can anyone provide some pointers as to why this javascript is failing?
I'm using IE6 on Win2k and when I click on the image to open the popup
window, it does open the window but it is white with no content and the
system immediately goes from about 4% CPU usage to 100% and
consistently stays there until I kill that window with the task
manager.
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Jul 23, 2005
I have two problems that I suspect will be bread-and-butter problems for the
more experienced guys on here, but I'm not the greatest with js.
NB: Code snippets at the bottom
The first problem is that after a bit of fiddling I'm getting am 'Object
Expected' error when I click on the Depot dropdown which I can't seem to get
round. The code I had was working OK but then I cut it all out, tidied it
all up, and put it back in and now it doesnt work.
The second problem is a 'How do I...'. I'm using an XML data island to
retrieve some data without submitting the form. In the first example, when
the user selects a Customer, the Depot list is updated with all the depots
for that customer; This all works fine. What I want to do now is retrieve
some more data when the Depot is selected.
I have the XML bits working; the js code snippet correctly output a series
of msgboxes with the correct value in (or at least it did until I introduced
the Object Expect error!).
However, I'm unsure as to how to display this information on the page. The
XML contains a series of Part No's and Quantities, which I'd like to display
in a table towards the bottom of the screen. The problem is that I don't
know how to dynamically create and populate this table.
The only caveat is that I dont want to show the table if no values are
returned from the query....
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Nov 10, 2011
I have the following bit of code:
<script>
jQuery(document).ready(function() {
var url='http://search.twitter.com/search.json?callback=?&q=test';
jQuery.getJSON(url,function(json){
jQuery.each(json.results,function(i,reviewa){
[Code]...
I'm baiscally trying to get some twitter feeds and the rotate them. I can get it and everything like that but for some reason the jQuery doesn't pick up the divs that I appended to the container because when I alert the div.length like this: alert(divs.length); The result is always zero. The code works fine if I can populate that value but if I don't have it in the code before hand it doesn't work. However if I add a div to the container like this:
[Code]....
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Jul 13, 2011
I want to add rows and columns on click. So, i have a table with columns and rows and I had a add and remove button. So I want the user to be able to add/remove more rows if they have multiple inputs/outputs.So what I want is when the user clicks on add.png, I want another row of Input and Description to appear underneath the current oneHere is my code..
<img src="images/add.png" width="15" height="15" align="right" >
<div class="open">
<table width="200" border="0">
[code]....
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Feb 1, 2006
I've got this shopping cart style form where the user can add as many rows(items) as they need.
The last textfeild in each row is the price, which is added up and displayed in the total box at the bottom.
But it isnt working.
can anyone get it to work, anything can be changed i dont care as long as it works(in IE) ....
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Oct 30, 2009
in my case i want to add a new menu item(actually a div tag) to my existing menu when an event or method calling occurs. i want to append a div tag dynamically to my existing menu with all css and effects.
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Oct 26, 2006
I've got an class/object that depends on two js files, but i'd rather not add them on the pages that uses the class/object. Code:
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