Get Information Using XMLHttpRequest On Page Load?
Jan 28, 2010
I am currently learning AJAX, and I want to write an simple example program (it is only for practice, it has no real meaning).
The program sends request to to PHP and gets response from it, then it should write the response using message box, all should happen on page load. I wrote the following code:
function init(){
myRequst = new XMLHttpRequest();
var url = "http://localhost/dummy.php";
myRequst.open("GET",url,false);
[Code]....
I don't see any message box when the page loads. When using it after the page loaded with other events (not onLoad), it works and I see the message box with the response.
How can I get the data on page load using XMLHttpRequest?
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Mar 23, 2006
I'd like to create a slideshow using the same technology that Google Maps uses:
Load/unload images offscreen and the user can drag the images around.....
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Sep 24, 2011
I have been successfully using the following "myAjax" function to load text file information from the server.
ajax.js:
After I load the text file, I store the text "records" into an array by doing something like this:
Where the '}' character is my record delimiter. It could just as easily be ' ' or ' ' or the like.
Again, I am not having any problems doing it this way as it suits my current needs.
Now the question(s)
1. Does the call to read the text data from the external file always read in the entire contents or can I read one line or delimited record at a time and store it to the array directly without the text storage?
2. If the text is always read completely (my suspicion), can I safely delete the "TextInformation" after I convert to the array format? Is there any memory penalty for doing it this way as the text information can be somewhat lengthly and I don't like the idea of having doubled memory usage when I only need the information in array format anyway?
This is the idea I am considering, but I don't know if there are drawback to this method of if there is a better way to accomplish the task.
ajax.js:
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Nov 9, 2010
I'm trying to create a simple checkout system that utilizes cookies to pass information from page to page. Currently, my entire script works fine except for the read cookie portion. I cannot figure out what is wrong with it. It has been validated and the syntax is fine; it just doesn't work. I use the function with the onload call on my html file such as:
[Code]...
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May 12, 2011
I have a single webpage that contains information on all 50 U.S. states. There are 50 links at the top to jump down to the state you want, and at the bottom of the information for each state a Back to Top link.
I'm making the Back to Top link into something more complex, and it will require three or four lines of code.
So that I don't have to repeat the code 50 times, and create a burden when I need to edit it, I want to place it in a .js file and call it x. Then below the information for each state I'll simply have:
Does calling code from a .js file 50 times slow down the page load? Which method would load faster?
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Oct 29, 2010
I have a HTML form containing two text box controls in it and a submit button. When a user enters information in those two textboxes and click on submit, the information is sent to a function in Javascript. In the javascript, the information from those textboxes is stored in a javascript variable. The problem is as follows:When I am inputting string text in the html text boxes and in the javascript when I am trying to print those values, it is giving me out an error saying NaN. However when i input integer values in the text boxes it is printing those numbers. Is there a conversion that I have to do for the string to be printed. I am new to Javascript and need your help. This is a basic code of Javascript. Below is the code that I have.
<html>
<script type = "text/javascript">
function square(form)
[code]....
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Mar 29, 2009
I am using Xmlhttprequest object and checking for the onreadystate event and calling a function(), this is called for every 1 sec using the setTimeout method, this works perfectly but using this does not allow to navigate to the next page by clicking the next button in the page.
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Aug 5, 2005
I'm making a somewhat unusual web page that will feature a showroom (this showroom will have images/video/qtvr/etc). If a pre-determined user comes to the page and views the showroom, I am essentially controlling it on my end by changing the database. The page needs to check the database every 2 seconds and refresh if the database value is different from what it currently is. The issue with using iframes or a meta refresh is that if a video is loaded, it will never play, because the page will always be refreshing.
So, that is where the XMLHttpRequest function comes in. I believe I have all of the basic code completed, but it of course does not work and I am probably missing something really simple or perhaps my approach is off. Code:
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Jan 30, 2009
I have some javascript code that does some GET and POST requests that are required. Sometimes it doesn't fully execute for the user because they close or click onto another page before the javascript is completely done. Is there anyway I can let all of the javascript load first and slow down the actual page load of the website.
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Aug 3, 2005
I am trying to use xmlhttprequest to make my aspx page more interactive.
its a page with a slideshow where the user can rate the pic, send a comment of this pics and other stuff...
when the user rate or comment a pic, the server side script works properly, but when im going to work with the response (xmlhttprequestObject.responseXML), it all screw up...
this is some part of my scripts: Code:
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Feb 3, 2010
I got a javascript function to pull contents from a php page, let's call this page B to the actual page, let's call this page A.
As I know when a page gets loaded the javascript on that page won't execute, am I right?
Now I need the javascript code on that page B to get executed. Is that somehow possible?
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Jul 23, 2005
Page works fine...however I get a little message on the bottom left of the page (on the bar) that says there is an error with the page.
How do I tell the page to tell me what's wrong?
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Sep 8, 2005
I am doing this:
window.location="page2.php?subj="+subj+"&body="+body;
to send information to another page.
However, I don't want that second page to show up or display in any way.
There is only behind-the-scenes work going on in that page.
How do I pass the information to that page so that it is only processed and
does not launch a window?
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Jul 23, 2005
Opening IE displays the following code fine.
When I open a new window the code no longer works. All the HTML is
overwritten with the first document.write statement.
This code pulls XML from a web site then parses it into a dynamically
created table built with javascript. The write table is not working
correctly, other methods work fine. This code also locks up Fire Fox to
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Aug 4, 2009
I am not able to submit the page details in IE 6 since am getting Javascript error: "unknown name" while submitting the page. If i press submit button for second time getting javascript error "Permission Denied". I tried to submit the details in IE 7 aswell the same error occurs.But i tried to submit the page in FireFox, its worked great... submitted without any error and the details saved in the database.
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Jan 18, 2011
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Apr 28, 2011
writing the script to be able to pull the information from the database without refreshing everytime something new has been added?
My codes at the moment read:
$recentupdates = mysql_query("SELECT * FROM status NATURAL JOIN users WHERE user_id = users.id ORDER BY status_id DESC LIMIT 0, 5");
$recentnumrows = mysql_num_rows($recentupdates);
[Code]....
the codes works of course. But I want it to be updated automatically when a new post has been made.
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Jul 23, 2005
I would like all of our intranet pages to provide a link to the site
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Can i somehow get this (or similiar) functionality using javascript?
You will notice that a _siteinfo.txt file has to be dropped into each
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This code also generates a page last modified date... but I did figure
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Oct 23, 2009
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Sep 2, 2010
$(document).bind('contextmenu', function() {
return false;
});
[code]....
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Jun 5, 2009
i have a form, and for the user to upload a file, i use window.open with my upload script. however, after the file is uploaded, i want the filename to be put back on the original page in an input text field. how would i go about doing this?
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Jun 22, 2010
I am trying reload a div on a page with content from another page using ajax.I am able to do this but the problem is that I need to wait for the page (that I am sending an ajax request to) to finish inputing all the relevant html before it is shown on the page calling the ajax otherwise the re-load of the div will not be up-to-date.
(Here is my code)
$('.addbskt').click(function(){
$.ajax({
type: 'GET',
[code]....
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Mar 22, 2008
Do u know of any free javascript script that will popup as a bubble with some information on it when I click on any form element in a page?
I can show you an example of what I want:
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Jun 18, 2010
I have a problem with XHR size limit. I want to transmit text information for page to a PHP script which saves it in a MySQL database but the data are cut off. When I reload the page the changes I made are gone. Firebug produces the following message:
... Firebug request size limit has been reached by Firebug. ...
This is my XHR function:
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Dec 29, 2010
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// holds an instance of XMLHttpRequest
var xmlHttp = createXmlHttpRequestObject();
// holds the remote server address[code].....
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Jul 14, 2010
Is it faster/more beneficial to have two snippets of code be generated by php at 2 different urls and then have a load function for each url? Or have the two snippets on one page, surrounded by id's and then load them that way?
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