I just thought this might be useful - short little pre-loading of images on webpage.
Code:
<body onload="preImages()">
<script>
function preImages(){
if (document.images){
aImgSrc = new Array("image1","image2","image3");
aImgLst = new Array ();
for(counter in aImgSrc){
aImgLst[counter] = new Image();
aImgLst[counter].src = "images/" + aImgSrc[counter] + ".jpg";
}}}
</script>
I'm finding IE9 handles the preloading of images using the Image object differently to its earlier versions.For example:
This code in the <head>
Code:
<script type="text/javascript">
var picData = ['num1.jpg','num2.jpg','num2.jpg','num2.jpg'];
picO = new Array();
[code]....
Earlier versions of IE seem to work as FF4 does.It appears that the window.onload event in IE9 does not take into account if all the images have completed downloading via the above FOR loop whereas FF4 and the others do.
The workaround I am using is to preload the images in hidden <img>'s at the top of the <body> and then loading them into an Image object to get the jpg's actual width and height. This is working in IE9, FF4 and the other majors.
I'm using ie 5 and I was preloading these images for a rollover and I noticed the preloading wasn't working.
I looked at my code from all angles and couldn't figure it out - checked online examples on how to do it - same way I'm doing it.
Checked a different browser - worked fine.
So is there a security setting in IE that may disable preloading stuff? Or idoes my browser just need to be reinstalled?
I'm finding IE9 handles the preloading of images differently to IE8 and FF4 and the latest versions of other browsers.
In IE9 the preloading still works ok unless I want to use the width or height properties of the created Image object before the src of the new Image has been assigned to an <img>
For example:
This code in the <head>
Code:
outputs '0 0' in IE9 and '150 250' in FF4 and the latest versions of the major browsers. 150 and 250 are the actual width and height of mypic1.jpg
Earlier versions of IE seem to work as FF4 does.
It appears that the window.onload event in IE9 does not take into account if all the images have completed downloading via the above FOR loop whereas FF4 and the others do.
The workaround I am using is to preload the images in hidden <img>'s at the top of the <body> and then loading them into an Image object to get the jpg's actual width and height. This is working in IE9, FF4 and the other majors.
Have I missed or misunderstood something in the the way IE9 works?
I am attempting to preload an array of images on my website so that they preload in order and only preload one at a time (the images are large and I want them to load in the order they will be viewed in.)So far I have this:
Code:
var images = new Array();
images[0]="website/users/user1/images/0001_000_808460.jpg"
images[1]="website/users/user1/images/0001_001_800872.jpg"
[code]....
This preloads the images all at once. I have yet to figure out a way so that "images[0]" loads first and completely before "images[1]" (and so on).
Is this the correct way to preload an image...?
Var Image1 = new Image()
....And then when I'm ready to use the image I can do this...?
Button1.src=Image1.src
....Or am I just telling Button1 to use the same source path as Image1?
I now have, in the header,
[Code]...
The above is in the first page where only the first image above, the before-and-after.gif image, is displayed. The rest are displayed in the second page linked to the first and are shown by using an array
[Code]...
I have a function that changes the src of an image:
JavaScript Code:
function ChangeSRC(url_src)
{
document.getElementById("photo").src = url_src;
}
[code]....
Neither of these methods seem to work; especially in IE. Is there a better way to preload dynamic images?
I'm working on an embedded system that I want to stream images from a webcam and having a world of problems.I originally started out using mime's multipart/x-mixed-replace to send the images to the browser and it worked well but IE has no support for it and it simply didnt work on slow connections.So i've changed to creating an image object and preloading it with JS but I cant get any onload functionality to work :crying: I want the page to preload a picture, display it, repeat with the next picture etc.
This is a rough version of what I have so far and it works while the timer is quite high >1sec, but just below that random images don't get displayed. With small delays, say 0.1sec the images are loaded but never displayed. why can't i get it to SHOW the image, THEN load the next one
PHP Code:
<script>
var image = new Image();
var tmr = -1;
[code]...
I'm trying to combine two scripts I found online to make a preloader for all the images in a folder. The javascript part works when you manually enter in a list of images, so I was trying to make a php array to get all the names of the images in one directory, then use that to list them. Here's what I tried:
<?php
function dirList ($directory)
{
[code]...
I am developing a website for my budding photographer son, Tom, and I want to provide an gallery where the user clicks on a thumbnail and this displays a larger image. The only way I see that I can do this is to have a link on the thumbnail to load the page again passing the image name or id to the page using a query string and processing this using PHP. If I preload all of the larger images when the site first loads will these images be available in the cache for other pages.Another way is to hover the thumbnails and display the larger image but I need to find a way to keep the image displayed until the user hovers over another thumbnail.
View 6 Replies View RelatedI have a page where there are 4 images that are loaded as a div background via css file.
When I try to use javascript to preload them it just does not look like its pre loading them.
I tried doing the following but the images don't pre loaded. They appear one after another.
Code:
<SCRIPT language="JavaScript">
<!--
pic1= new Image(100,25);
pic1.src="http://someplace.com/image1.gif";
//-->
</SCRIPT>
I am trying to preload over 300 small images. I am using a local developement server at this point and testing in IE. As the user interacts with the page many different images will be appear and dissapper for them. It needs to be smooth. I was noticing that the status bar at the bottom of IE keeps saying the images are being loaded. So I thought I would try preloading the images. After implementing the following code, the IE status bar seems to still show that the images are loading each time and I havent noticed any improvement in load times. Could it be that the images are not really being preloaded? Here is the code I am using to preload (it is triggered by onload in the body tag:
imageObj = new Image(width, height);
imageObj.src = "images/pp1234.png"
my actual code repeats the second line many times in a loop with different image names, but this is the most basic for of my code and it results in the same problem. Are there known issues with IE and preloading?
I've inherited responsibility for our church's website. It has a
sizeable main menu, which uses mouseover image swaps. These images use a
pre-load script but the script is only included in the index.html page. My
javascript knowledge is weak, but it seems to me if a viewer arrives first
at page12.html, he gets no benefit of the preload script. My quandry -
Should I include the preload script on every page, or would this force each
of these images to download again everytime a viewer moves to a different
web page, thereby gumming up the whole works? If I don't add it to every
page, the viewer who enters thru a backdoor has a sluggish menu, right?
If the right approach is to include it on every page, can I do this with an
external js file? Will I need to call this file, or will it work just by
including the js statement in the <head> section:
<SCRIPT LANGUAGE="JavaScript" SRC="preloadscript.js"></SCRIPT>
I currently have a Javascript application that randomizes about 200
images. The problem is that the images preload, which causes the entire
site to not come up until all the images are loaded. I'd like to find a
Javascript application that can load images as they are randomly
chosen. In addition, I'm trying to figure out how to not display the
same image more than once; or at least until after the 200 have been
displayed, then create a new randomization of the 200 images.
Let me know if anyone knows how to do this or can point me to code that
is able to do what I'm looking for.
A small problem has come up and I'm and I'm not sure how to resolve it. The problem is I do not want my images to preload in an image gallery on one page. [URL]. The images in the gallery you can see are preloading. How can I stop them from preloading? What would I need to do? I just need them to load whenever the user clicks on one. Preloading just takes up uneccessary time. Here is the Javascript code: [URL]. What should I do? I do not know javascript very well.
View 4 Replies View RelatedI want to preload some images for a webpage _and_ determing their width and
height. The problem is that the scripts continue while the images are loaded in the
background, while I need the thus undefined values of image.width and image.height.
Thus I'm looking for a function which stops executing my script until the
images are all fully loaded.
Some non-working sample code included. Notice this only doesn't work well on Firefox. The code runs without errors, but it doesn't get the correct height and width. To see the
problem the images used shouldn't be in the browser cache. Code:
i know that the background attribut on table is not official but you can still use it and it will load an image as a background but i have an already coded site wich uses this background tag and a preload image js function wont work correctly, is there an solution to this?, right now i only see changing the code of the page(it's a damn nasty table based code)
View 1 Replies View Relatedi have a requirement that i need to loop through a series of images(say 4 images) with an even inteval of time.I need the first image to come and after some 4 secnds the next image and then the next image.i used 'setTimeout and setInterval' both doesnt seems o be helping me out.pls find the code that i ve written below:
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
[code]....
I have a question about hotspots in JavaScript. I'm trying to make a web page with two images. I would like to have Image 1 consist of five hotspots, each of which would change Image 2 when it is moused over. Basically, Image 1 would be divided into five small pictures, and when the user placed their mouse over one of the small pictures, Image 2 would change to match it. Is it possible to do this with hotspots? I could convert Image 1 into five different images and stack them, but it would be simpler to do it this way if possible.
View 1 Replies View RelatedAm using jquery and javascript to load images.Everthing is working fine, but I would like the user to be taken to a webpage for each of the images below.
Code:
function PreloadImg(){
$.ImagePreload("/images/slash2.jpg");
[code]....
I'm building a website which uses javascript to cycle through and fade images in the header portion of each web page. The javascipt os located in an external file and called via the master page. Here is the code in the content.js file which specifies where the images are located:
// create array of images
var CyclingImages = new Array("header/images/tankimage1.gif",
"header/images/tankimage2.gif",
"header/images/tankimage3.gif",
"header/images/tankimage4.gif")
Here is the code in the master page which finds the javascript:
<script language="javascript" src="<%= Page.ResolveUrl("~/content/content.js") %>" type="text/javascript"></script>
Here is the function call in the masterpage to fade and cycle the images:
<body onload="FadeAndCycleImages()">
Here is the code in the masterpage which references the cycling images:
<span class="fadingimages">
<img src="<%= Page.ResolveUrl("header/images/tankimage1.gif") %>" width="142" height="124" title="" alt="" name="cyclingimage" />
</span>
Each webpage loads the masterpage. If the webpage is located at the root of the project, the cycle and fade functionality works great. When I start to place some of the webpages in separate folders - which I need to do - the cycling and fading functionality breaks down, meaning the images cannot be found. The image place holder is there with the standard red "x" in the upper left. I have done a lot of research and tried many approaches to try to resolve this issue, but with no success. The root of the problem seems to lie in the fact that I cannot apply Page.ResolveUrl within the content.js file.
It launches in IE and give the user instructions, then at the click of a button, launches my setup.exe. I want my webpage to launch setup.exe then go to another webpage on my CD, congratulations.html, which says "installation is complete etc". Here's what I am trying to do through JAvascript. It doesn't work. Should the first instruction be flushed in order for the 2nd one to work?
[Code]...
I want to use the values of text boxes on my HTML webpage to create a webpage URL (like below):
<script type="text/javascript">
My text boxes are as follows:
Now this all works and the result webpage URL prints to id='ID1', but the big question is how do I use this resulting URL in another Javascript section as the src="?
For example:
I am trying to display a webpage from another domain and tried to access its elements and I am facing issues with this.
I tried using "iframes" and am facing cross domain issues.
All that I want to do is, set and get the attributes of the elements of the webpage from the other domain (eg: set text field value, get dropdown box values, click button etc)
Is there a way to get this job done?
I thought of browser addons however it will be a browser specific solution.
1st post: how to force an iframe to reload? 5th post:how to force an iframe to reload? i tried the first way, and this doesn't work, then i try this:
[Code]...
