Adding Javascript Dynamically
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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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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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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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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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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Mar 22, 2010
i am having a table with some rows, which are shown under some categories. how can i dynamically add some rows to the table. there is a '>>' symbol infront of each category names. when i click on that symbol, i want to enlarge this category by adding more no of rows under this. And the symbol must turn to '<<'. when click on this, the reverse thing, ie, remove some rows and shows the initial rows.
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Jun 23, 2006
I am trying to add an event listener to the keyup event for some text
inputs that I am creating dynamically. I have no problems getting it
to work in Firefox, but IE just ignores them. I have created a few
functions to aid in making this process work semi-cross-browser. (I
develop in FF, but everyone who uses it will be using IE6.) ....
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Aug 24, 2010
How do I add form inputs dynamically? I found form wizard plugin, but it could only add one element.
$("#finland").after('<span class="step" id="added_step">New step added in the update steps callback</span>') I needed it to add the same elements as much as possible, how do I do that with the code below?
[Code]...
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Jun 1, 2010
It works perfectly but I need to add more fields than stated in the post. If I add in another field, only one field gets the increment. The other doesn't. Eg.
<form id="myForm" method="get" action="test.php">
<div id="input1" style="margin-bottom:4px;" class="clonedInput">
Name: <input type="text" name="name1">
Tel: <input type="text" name="tel1">
</div>
[Code]...
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Aug 17, 2009
I have the code below, when I put it directly in the html, I am able to drag and drop into it.When I try to add it dynamically, and I look in Firebug, the added column is identical with what I added manually in the html, yet, it will not allow me to drag and drop into it.
[Code]...
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Apr 21, 2006
I am facing a certain problem when I try to add a content to a page dynamically and then save the page. I add a content dynamically to the page on a mouse click and then after the content appears in the screen, I try to save the HTML file from the browser. When I open the saved HTML file, I am not able to see the dynamically added text. This happens only in IE.
This is the code that I use.
"document.body.insertAdjacentHTML("beforeEnd", "<div id='idCanvas'> Sample Text </div>");"
This code successfully adds the new text to the page. But, when I try to save the page from "File -> Save As" and then open the saved file, I am not able to view that text. I need to get that text in the saved document as well.
I also tried using:
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Jun 15, 2011
I am trying to make it where someone can upload a .csv file, and I want to allow them to add multiple ones if they need more than the two that are already there.
What I did was add a div field:
Code:
<div id="fields" style="display: none;">
<p><label>File Field:</label><br /><input type=file name=file size=45 class=formfield /></p>
[Code].....
The problem with that is once they choose a file or two on those first two, then click the add a new field, it does add the new field so it works, but then the files they chose are gone, so now they have to rechoose them. every time.
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Jul 23, 2005
Attached is a simple HTML file that adds and delete rows. In the add
row function I set an attribute "onClick" this triggers the
testMessage() function. When I try this in Firefox it works just fine
however on IE it just refuses to work.
What is interseting is the ROW that already exists has a similar
'onClick' event which works when the page is loaded, but subsequent
"row" additions to the table to not work in IE. Code:
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Nov 6, 2011
I have a <div> containing 3 buttons. The buttons have id's like this:
Button 1: btnFoo
Button 2: btnBar
Button 3: btnBaz
I'd like to add an click event to each button to call a function named [button ID]_click():
i.e.
btnFoo_click()
btnBar_click()
btnBaz_click()
So far I have this:
$("#divButtons button").each(function() {.
$( this ).bind("click",function(){
eval(($(this)[0].id) + '_click()');
});
});
This works but is there a way without having to use eval and still utilizing the lovely .each function?
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Apr 13, 2010
I am currently working on a site as part of a student work term. One of the features of this site is the ability to upload a resume. The resume can have a arbitrary number of "work experiences". I have set up a form and want the user to be able to add new input elements with a click of a button. Here is a very pared down(for simplicity) version of the form:
[Code]....
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Sep 5, 2010
I have a table with onw row and one column.I have set class for column also written function for click event for class.Now added table row dynamically and set same class.But click event works only for existing row not for newly added row.
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Jan 8, 2012
I can't append click event handler at the <a> element when it is created by jquery on that way...
<script type="text/javascript" language="javascript">
$(document).ready(function(e) {
// Abrindo textos na língua padrão do website.
[code]....
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Aug 28, 2009
I have a form, and i am trying to add the values of 5 fields into one javascript variable. Then i need an ajax function to search a directory for a php file made from these variables and return a "file exists" or "file doesnt exist" message to the form.
For example, assume the following values have been inputted into the fields;
Field1 (Manufacturer) - Kawasaki
Field2 (Model_Name) - GPZ500
Field3 (Nickname) - None
Field4 (Market) - UK
Field5 (Year) - 2000
Then javascript needs to add the values of Field1 - Field5 (and add a few bits)to create (for example):
Kawasaki_GPZ500_None_UK_2000.php
Then i need ajax to search a web directory for the file above, and if it exists return a link, or if it doesnt exist tell the user it doesnt exist.
im hoping that i can use ajax to do this search without clicking any buttons etc. unfortunately i have very little knowlegde of javascript and ajax and dont have a clue how i can go about implementing this.
i know how to do it by posting the variables to the next page and doing the check using php - but i would like instant validation as soon as the form fields have been entered.
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