Image Refresh On Error
Nov 14, 2006
I am building a preloader using the usual:
var img = new Image();
img.onload = done;
img.onerror = image_error;
img.src = 'image.gif'
Things seem to work fine except some times the loading will fail due to a problem such as network error or dropped connection or something. Then the browser will actually cache the image as failed and will not re-attempt to get it again from the server even though it would have probably succeeded on the second attempt.
I have done some testing and it seems that with Firefox I can go through the above procedure (img.src = ....) and it will attempt to get the image again. IE doesn't do that. It will immediately fire onerror again even though if it had attempted to load the image again it would have succeeded.
Any ideas how to get IE to drop the failed image from the cache and request it again from the server?
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Dec 12, 2009
I have been using asynchronous requests for a long time. so the response was processed in a callback function. I thought of not using async so i made synchronous requests. The reason is that i dont have to have two more lines for checking the status and the onreadystatechange.... my synchronous requests would be like this...
[Code]....
so from the code you can understand that there is no need of a callback function and if conditions to check ready state... ... So there is no problem in the above code. The problem araises here... if i press the F5 (refresh) key or do a page refresh when the process is waiting for the response i get an (NS ERROR - firefox ( i have not yet checked that in IE browsers) (javascript error) though the process completes successfully. why?
Do we have to check whether the page is navigating away while in synchronous operation and abort the request? or what could be the reason for the error. This will not happen in async requests because that is also the reason for async...
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Dec 18, 2009
Is there a code to auto refresh the page if 503 apache error message appear ?
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May 22, 2002
I have a VERY simple script to reload a page with fresh values when the value of a scroll menu changes. Trouble is, of course, NN 4.- freaks and closes the browser when this runs. No error warning, no error log?
The line..
<select name="Country" size="1" onChange="repopmenu(this,17)">
The script..
<script language="JavaScript">
<!--
function repopmenu(which,key)
{
n = which.value;
var url = ("eventedit.asp?country=" + n + "&key=" + key)
location.href = url;
}
//-->
</script>
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Dec 19, 2009
is there a code to auto refresh the page if 503 apache error message appear ?
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May 24, 2011
I want the images to change in sequence when the page is refreshed not random like i have below. Also I also need text to change on refresh to because I am going to have a descritption of the image below.
[CODE]
<script type="text/javascript" language="JavaScript">
var imgs = new Array('<a href="VW_1.shtml"><img border=0 src="img/samples/VW/large_1.jpg" width=165 height=109" class="thumbnail_img">',
[Code]....
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Jan 4, 2006
I need a very simple script that will refresh a single image every blank seconds. I have this one, but I am having trouble getting it to work: Code:
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Apr 20, 2011
I've got an image that I want to refresh every time a certain event occurs. So in my html I've got something like <div><img name="theImage" src="anImage.jpg" alt="No image found" onclick="refreshImage();" /></div>
Then in the javascript I have
function refreshImage()
{
var now = new Date();
document.images["theImage"].src = "anImage.jpg?" + now.getTime();
}
So before I click the image to trigger the event, I change the image on the server, but keeping the same name. So the image displayed in the browser should change to the new one when I click it. But when I do this, the image DOES change, but part of the bottom gets cut off. There's enough space for the whole image, in fact if I put a border around the div, the border is just the right size, but only part of the image is being displayed. Also, it is always the top part of the image being displayed.
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Jul 9, 2010
I have a script which allow users to chnage there profile image, and it allmost works perfect. The script is set up so when a user uploads a new picture it overrides the previous one, so if a user have an ID, lets say 15, the image would be called 15.jpg. The problem is that when an new upload is finished it still shows the old image, I think by cache, and thats no good. How do I refresh the image with ajax so when the script has done uploading the image is the new one?
The javascript upload.js:
Code JavaScript:
<!--
function startUpload(){
document.getElementById('f1_userimage').style.visibility = 'hidden';
document.getElementById('f1_upload_process').style.visibility = 'visible';
[Code]....
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Nov 28, 2007
i guess it best i explain what i am trying to do and then what i have done so u can hopefully point out my mistakes.atm i have a webserver setup at home ( local only) and an internal ftp program running on the webserver... i have an ip camera ( mobotix) ftping images every 1 second to the webserver and puting the jpg image in a folder called testpic.what i am trying to do is get a script working so that it auto refreshes the image every second.[code]this basic site puts a copy of the image1.jpg in the middle of the screen and then refresh it every second. but for some reason it displays the first one then when it refreshes the image there is no picture just the box with a cross.. now i know that the image has updated in the testpic file cus i can F5 the page to display the new image that the script should have loaded.
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Dec 23, 2010
I'm pretty new to all this javascript and jQuery stuff, so please have patience with me if I don't understand your answers the first time. I'm toying around with a tiny page for my webcam and I'm already using jquery to update the image(s) everytime 15 seconds has gone by. I've tried implementing fadeIn so the image just fades over to the newly refreshed image, but I haven't had any luck with it.I hope some of you can lead me in the right direction as to how I can implement this function.
[URL]...
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Jun 14, 2010
my dilemma at the moment is that I have produced a site where the client would like the logo colour/image to change on refresh which I have achieved by scouring the net for codes and altering them. Now, the client wants the shapes behind the sub-headings to match the current logo colour/image on refresh as well. This would mean if the logo changed to the blue logo, I'd need all the sub-headings to be blue, and vice versa for another 3 colours.I'm struggling to understand how I can achieve this. At the moment, I have a javascript inside the code of the index page allowing logo image change on refresh but need the sub-headings to change in sync too.
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Sep 15, 2004
We've got a server-side page (status.php) that dynamically generates a GIF image. The displayed image depends on the value of a boolean field in a database. Just calling the page displays the current value of the boolean, calling it with a parameter switch (status.php?switch) flips the database value and generates a new image. We've included headers to prevent caching of the image by the browser.
Whenever our HTML page is displayed in the browser, we just include an image that shows the current status: img src='status.php'/
We want to allow the user to click the image, which then inverts the boolean status in the database: img src='status.php' onclick='this.src=status.php?switch;'/
This works great in Internet Explorer, but both Mozilla and Opera only allow to switch once. My idea of the problem is that those browsers think like this; after one click, the src is already 'status.php?switch', so changing the src again would be redundent in their eyes, so they won't do it.
We found a temporary solution by generating the current time as a parameter in the image URL: img src='status.php' onclick='this.src=status.php?switch+(new Date());'/
However, this is not a very elegant solution.
Does anyone know a proper solution to this? This means, forcing Mozilla and Opera to load an image using JavaScript, even though the URL of the image didn't change?
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May 11, 2011
What I am trying to do: A full screen background image, that auto refreshes every 3 seconds.
How I am doing it: I am using EvoCam for my camera software. It uploads the image to my server every 3 seconds, perfectly fine. I am using "Back Stretch" for my full screen capabilities, as I found it to work best is all browsers. BackStretch
My Problem: Using backstretch, applies the background image to the page through javascript, so I dont have an <img> tag to manipulate. A lot/all of the image refresh scripts I have found, use examples where there is an <img> tag. I had used another jQuery method of doing the background that had image tags but did not work in all browsers. When I was using this method, I ran into cache problems where the new image would not load.
Where do I go? I am feeling a bit lost, being relatively new to Javascript, I am unsure of how to go about clearing these problems I have. I feel that the eventual answer is to timestamp the photos, and include the timestamp into the image refresh, and somehow make it so that I am refreshing the
Code:
<pre><code><script type="text/javascript">
$.backstretch("images/myCam.gif", {speed: 1});
</script>
</code></pre>
that controls my background image. I have found scripts that include timestamp refreshes, but the way that EvoCam timestamps the image is of a different format than the way Javascript uses
EvoCam images look like: webcam2011-05-11-16-21-34.jpg
and I thought Javascript looks relatively the same, but without the dashes.
I have a test page set up, where you can see my surly, discouraged face [URL].
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Nov 10, 2009
I have inherited an image scroller that works perfectly. That said, the PM said the client now wishes that upon refresh or a new landing on that page - the initial image would randomize. I thought it would be cake to fix this. Not so. I have tried Math.random at every conceivable place in the function. I get bumpkis. Here is where I think the problem is . . . if anyone would like to take a crack at this.
Code:
// 4. paging function
function gotoPage(page) {
var dir = page < currentPage ? -1 : 1,
n = Math.abs(currentPage - page),
[Code]....
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Nov 29, 2011
I am trying to create banner where the image changes when a user refresh the page. Below is the script:
// JavaScript Document
<!-- TWO STEPS TO INSTALL RANDOM IMAGE:
/* 1. Copy the coding into the HEAD of your HTML document
[code]....
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May 26, 2011
I want the images to change (rotate) in sequence when the page is refreshed not random like i have below. Also I also need text to change on refresh to because I am going to have a descritption of the image below. So the image and text sync up together when some refreshes the page or goes page to the home page.I want the images to change like on this page Loading A Specific Image Sequence On Page Refresh Via JavaScript / DOM
Code:
<script type="text/javascript" language="JavaScript">
var imgs = new Array('<a href="VW_1.shtml"><img border=0 src="img/samples/VW/large_1.jpg" width=165 height=109" class="thumbnail_img">',
'<a href="fortshelby1.shtml"><img border=0 src="img/samples/Fort Shelby/image1-large.jpg" width=165 height=109 class="thumbnail_img">',
'<a href="jaguar1.shtml"><img border=0 src="img/samples/Jag_of_Novi/large_1.jpg" width=165 height=109 class="thumbnail_img">', .....
var max = imgs.length;
var num = Math.floor((Math.random() * max));
document.writeln(imgs[num]);
</script>
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Sep 12, 2010
I am building a site with ads that I want to rotate positions (this way I can keep it fair for advertisers- the bottom ad rotates up to the top) upon refreshing the page, searching through the site, or each time the user visits. I have three images (sponsor1.jpg, sponsor2.jpg,sponsor3.jpg) that are always displayed vertically in the right banner. I assume this is just a simple javascript slideshow tweaked a bit but can't figure it out.
I find plenty of js scripts that will rotate several images through one image location, but I want image POSITION 1 to start with sponsor1.jpg, image POSITION 2 to start with sponsor2.jpg..and so on... then upon refreshing the page image POSITION 1 is holding sponsor2.jpg, image POSITION 2 is holding sponsor3.jpg... etc
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Sep 27, 2010
I wanted help for a JavaScript code. You might think I'm lazy for not writing it myself, but the truth is I am not a JavaScript coder. I just have a really simple website and I am trying to do something for which I know JS is required but I don't know how to do it. I've also searched around but couldn't find the appropriate code.
What I want to do is to make an html page load a different background image every time it refreshes.I will have a list of background images and I want to be able to add in this list, without having to change anything else in the codes after I do this (I think this is made by making an array of images and by putting .length somewhere in the codes, but I don't know exactly how I should do this).I already know how to do an external file (.js) and link to it from my .html page.Now I want the code to put in the .js file, and the code to put in the <body> of my .html file.
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Feb 22, 2011
I have a page that contains thumbnails for a photo gallery. On this page is a link to upload more images. When you click the link a modal opens that contains an upload form (jquery colorbox in an iframe) which will allow you to upload one image (plus its name, caption, etc) at a time using PHP. When the form is submitted the image uploads and the page refreshes in the modal to allow for more uploads.
Since this modal is sitting on top of the existing gallery thumbnails I'd really like for the user to see the new thumbnail added to the page after it's uploaded.
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Oct 16, 2010
I have got a DIV that I need to refresh, its content consists of an image that will change on the insertion of a row to the SQL Database, however, when I use a refresh on my div it does refresh but does not change the image...
My refresh code is ajax:
And my PHP code contains the MYSQL that has a mysql_num_rows, so that PHP can see if there are rows or not.
I would like my page not to redirect or refresh on my div change.. So I would just like my div to refresh.
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Mar 30, 2011
I have questions related to three operations using jQuery:refresh a div element on page lo append an element on top of the other elements in div change an image (pending/accepted) from the div's elements I know that there are tutorials for that, but i am so short in time.I just finished my PHP courses, and i am too tired to get into the jQuery magic right now.ere is the situation that i am confronting. I have to files: propune.php (which is basically the page that has the form and the div that should be refreshed/appended) and propuneri.php (the file that is handling ajax calls).
propune.php
(partial) http://pastebin.com/SFJ7zSRJ
propuneri.php
[code].....
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Jul 9, 2002
This JavaScript checks if all the images in the document exists. If a particular image does not exist, that image will be replaced by a custom image! Works with IE only.
This is how it works. In IE, if a particular image does not show up, then its dimensions are 28 x 30 (without the 'alt'). So, the script checks all images with this size after removing the 'alt' tag. If such an image exists, it is a broken-image.
<script language="JavaScript">
function checkImages()
{
if(document.getElementById)
{
var imagesArr = new Array();
var setDefaultErrImg="image_nf.gif"; // Default image to be displayed on error
var setDefaultErrTxt="Image Not Found"; // Default text to be displayed on error
imagesArr = document.getElementsByTagName("img");
for(var i=0; i<imagesArr.length; i++)
{
if(!imagesArr[0].getAttribute("nc")=="1")
{
var tempImgAttrib=imagesArr[i].getAttribute("alt");
imagesArr[i].setAttribute("alt","");
if(imagesArr[i].width=="28" && imagesArr[i].height=="30")
{
imagesArr[i].src=setDefaultErrImg;
imagesArr[i].setAttribute("alt",setDefaultErrTxt);
}
else
{
imagesArr[i].setAttribute("alt",tempImgAttrib);
}
}
}
}
}
window.onload=checkImages;
</script>
When you use the script you will require your custom image (image_nf.gif, here)
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Mar 11, 2009
when I extend the Image Class (using prototype), IE6 starts to cry:
Code:
Image.prototype.resize = function(width,height) {
var inc;
if(this.width > width) {[code]....
I'm not sure if its because I have the function name resize, but it seems that the script crashes once it comes across that snippet of code.
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Jan 16, 2008
i have anerror when i try to swap background images, it works fine in firefox, safari, opera but in IE7, i get this :
[Code]...
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Oct 14, 2007
I'm having a problem with the image swap javascript provided by Dreamweaver. Here are the versions of all software concerned:
Internet Explorer 6
Firefox 2.0.0.7
Dreamweaver 4
- function MM_swapImgRestore() { //v3.0
- function MM_preloadImages() { //v3.0
- function MM_findObj(n, d) { //v4.0
- function MM_swapImage() { //v3.0
The image swap works fine in Firefox. The problem occurs in IE6. The roll over image in the 4-6index.html page loads the onmouseover image of all the images over the schedule image at the bottom (see website).
When you follow one of the links, such as "see the activities" the image swap script fails completely on that page and produces an error, which is identified, in the debug brief, as being on line 2, character 5 (which, if i'm not mistaken is the character > )
I've created a test page using the same Dreamweaver code for 3 image roll overs and the code worked fine. Upon comparing the code from that test page and my website i see no difference. The Javascript in the header is identical and the code in the body follows the same structure. Code:
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