Tricky Layer/image Loading Question
Nov 28, 2006
What I'm designing is a page with many layers each containing an image, these layers are about 300x200px in size and are spread over a large space on the page, which will force the page to be about 5000x5000px in size. The user will then have to scroll around the page both horizontally and vertically in order to see these layers containing images.
However, if all of these layers with images are loaded when the user enters the page, the used bandwidth will be huge. So what I'm thinking is figuring out a way to only load the images/layers that are in the users view, so that when the user scrolls to a new spot on the page, the images in that area are loaded, but not before.
How can I achieve this?
I have a notion that I might need a function to check which x&y position the user is at, and then set the content of a layer when the user's view 'contains' that layer. Is this a good way to proceed, and which functions should I look at?
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Aug 19, 2003
Would it be possible to have a webpage with normal HTML, but make it so the user can highlight some text, click a button and make it perform a word count on the selected text and disply the number of words in an alert()?
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Apr 4, 2002
Layer writing in Netscape. This is pretty straightforward >> However I'm trying to write to a <div> layer within a <div> layer.
My div:
Code:
<div id="blah">
<div id="aight">
</div>
</div>
I'm trying to write to "aight"
How should my code look?
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Jul 5, 2009
I've been looking all over the place in order to find a script like they use on Foliostars, where you see a sliding semi-transparant text layer over a thumbnail image when you hover. how to achieve this using JS or an Ajax framework (preferably JQuery)?
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Nov 3, 2005
I need some help on how to reposition a layer depending on the position of an image? I know this should be somewhere in the forum, but I searched without success.
I mean like this:
<body onload="movemylayer()">
<img src="1.gif" id="myimage">
<div id="mylayer"></div>
</body>
...And when the page is loaded the layer moves infront of the image.
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Mar 25, 2010
I've tried the tutorials but I have never worked well with those -- I've always found it easier to actually be working with someone. But anyway. Basically, I need something sort of like this [URL] -- you click the thumbnail and the image appears in that predetermined spot. One thing, though: the images have to layer over each other. Like, you click image A, and it appears in the spot. You click image B, and it appears on top of image A. It'd be even better if when you clicked Image A it appeared and then you clicked image A again and it disappeared, but I'm going to try to start small.
I've gone through the tutorials and have a sort of ish understanding about what some of the parts of the codes do, and I've been told I'm a fast-ish learner, so I think I'll catch the hang of this quick.
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May 17, 2009
How can I open a zoom image layer on mouse over, similar to [url].... Screen shot attached.
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Jan 30, 2009
I have created a floating layer using Javascript that remains always on top of page on scrolling.Issue is,at some point while scrolling,the layer flickers continuously.
The html page is as follows:
Many common software systems, JavaScript has a history of security problems. Many of these problems could allow a person with malevolent intent to steal sensitive information from a visitor. The number and type of such holes in security vary among browsers and operating system versions. Most JavaScript security holes have been caught and fixed, but new ones are being discovered all the time. For a list of current security holes check out your browser's and operating system's Web pages. As a Web site author, it is your responsibility to keep up-to-date on the current status of known security holes in the applications you create.
Signing Scripts. In Chapter 11, I explained that JavaScript does not provide the ability to directly access files on the client computer. This can be a very large hurdle to overcome if you're trying to upload a file to a server from the client computer. Fortunately, file uploading is one of many functional enhancements that signed scripts provide. Signed scripts are specially packaged scripts that have been verified and signed to be correct and non-threatening. These scripts have additional rights on the client computer that allow a programmer to do many things that he wouldn't otherwise be able to.
With the introduction of Netscape 4.0, a new security model was put in place that would allow digitally signed scripts to bypass some of the restrictions that had previously been placed on them. A signed script can request expanded privileges from the visitor and, with the visitor's permission, gain access to restricted data. A signed script requests these additional permissions through LiveConnect, which allows your JavaScript code to communicate with the Java Capabilities API. The security model allows JavaScript to access certain classes in Java in order to extend its functionality while still maintaining tight security for the client.
A digital signature is a fingerprint of the original programmer, and it allows the security model of the browser to detect where (or from whom) it originated. A script signer can be a person or an organization. By signing a script, you acknowledge yourself as the author and accept responsibility for the program's actions. A signed script contains a cryptographic checksum, which is just a special value that ensures the signed script has not been changed. When a digital signature is detected, you are assured that the code has not been tampered with since the programmer signed it.
Once you finish writing a script, you can use the Netscape Signing Tool to digitally sign it. Signing a script does the following:
Unambiguously assigns ownership of the script to a person or organization.
Allows an HTML page to use multiple signed scripts.
Places the signed script into a Java Archive (JAR) file.
Places the source of the script in the JAR file.
Once a user confirms the origin of the script and is assured that it has not been tampered with since its signing, he or she can then decide whether to grant the privileges requested by the script based on the validated identity of the certificate owner and validated integrity of the script.
JAVASCRIPT FILE IS AS FOLLOWS:
AND CSS FILE IS AS FOLLOWS:
At some point while scrolling,the div 'movable' flickers continuously,while at some other point,it is perfectly stable.
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Jul 27, 2009
I have this loading.gif image that is 750px, when it should be 32px. The reason it's huge now is because my original solution was displaying two images: one 750px version of the loading.gif image and one 32px version (in the center of the 750px) of the same image. Now I'm at least down to one image, even if it's the wrong version.Click any of the thumbnail images here, and then again on the thumbnail at the top of that popup product gallery to see what I mean: need that huge loading.gif to be 32px like it should be, and then expand to 750px once the image is loaded. I've tried a bunch of solutions, but nothing has solved the problem.This is the code I have at the moment, although I'm working on the issue now so it may change.
$('#inline .thumbGrid img').click(function(){
var strLargeImg = document.getElementById('OBOEsac');
$('.galleryPopup').attr('src','/site/scripts/colorbox/images/loading.gif');
[code]....
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Oct 13, 2009
I have created a party-events website. Which displays a lot of dates of events. As you might understand this page takes some time to load. Therefor I want some of loading image to be displayed while the page is loading. Anybody has an idea how to pull this of? I don't know how.
In detail: People come to my website. They click on "events" and a loading.gif pops up and and makes the background darker. After the page has completely loaded the loading image disappears and the website shows.
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Nov 17, 2010
In one of my web page I want to show an image preloader. ie When I clicked on the small thumbnail in my web page then the main large image will load. My code looks something like this
$("#images li").click(function(){
var image=this.href;
$("#mainImage").attr('src',image);
});
I want to show the Loading sign until the main image loads completely.
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Jan 14, 2011
How to display loading gif image until the big image have loaded? Now I have the html and js but it doesn't work. Anyone have some idea or solution ?
[Code]...
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Aug 1, 2010
I was searching for a way in which I can load a very big image progressively in a div or when we use thickbox for example : when we open a very big image file directly in Firefox , it started showing the image right away progressing it to complete image.
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Jan 20, 2006
I am using DOM to swap between DIVs to give the effect of a tabbed display window. Each of the DIVs contains its own images. I don't want all of these images to load with the page but rather just to load when the relevant DIV is selected. (All but 1 DIVs are hidden initially.)
By default, is this the case? Or can I use a function to not allow the images to load until I tell them to?
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Feb 6, 2006
I use the code to load image:
document.getElementById("screen").src = "Images/img1.jpg";
The issue is the image's size is about 9Mb. So I want to display the waiting mess while loading. Which "event" that notify "complete loading" that I can use?
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Sep 15, 2010
We are currently trying to locate the JS that will allow us to implement a progression of low-res-->hi res load for the big background images we have on each page of our new web site.In other words, we have a ginormous photo in the background, and want to avail the browser a very lo res version of said photo while the big photo loads.I have a feeling this is a real rookie question, but still, if there is anyone that can advise I'd be super grateful
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Oct 18, 2006
I have an image that I want to delay the load of by 3 - 5 seconds. I've found tons of stuff on how to preload images, but nothing on how to delay the load of images.
I think this is something I can do with JavaScript and the setTimeout function. (If it's not, just direct me to the correct forum.) However, this is the image code and I just need to delay it loading:
<a href="http://www.website.com"><img src="http://www.website.com/image.jpg" class="imgclass" /></a>
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Feb 21, 2010
How can I add loading image into this script?
var xmlhttp;
function showUser(str)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
[Code]...
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Jul 23, 2005
I need to delay something either an image or a table from loading for 2-5
seconds. So far I have not find a good method.
I need the rest of the page, even the codes after the delayed image, to be
displayed in real time.
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Jul 20, 2005
I am handing a string as a parameter pImage = "Images/Available.jpg"
If this image is NOT available I would like to load Images/NoImage.jpg.
Unfortunately the following code does NOT work.
obj.write('<p><img src=' + pImage + '
border="0"></p>');
Where is my mistake ?
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Feb 11, 2011
I have written some JAVA code that pulls and image from a DB and writes out the byte stream.When I call the URL directly I can see my image, however when I use something like:
function loadImage(filename) {
$(document).ready(function() {
alert('loadImage Called with ' + filename);
[code]....
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Aug 19, 2011
I am attempting to stop the loading and replace images with processed ones using the below code, the problem seems to be that even though I am removing the src attribute the original image still loads.
[Code]...
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Jun 11, 2011
I am using a slideshow and want to basically have an 'image loading' whilst all the images load before the slideshow. Is there a way to do this? So far I have figured the best way around this is to have a GIF as a background image that says the loading message, and then once the slideshow loads over the top its fine, however im guessing this is'nt the right way to do this. I am using this slideshow set to just loop:
[URL]
I am open to using other similar slideshows if there is one more suited.
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Sep 15, 2011
I am an asp.net developer and I wanted to display user popup (kind of) which freezes the screen so that user won't click anything else on the screen. There are some predefined controls in asp.net, but I wanted do this using Javascript.
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Jul 27, 2010
I have a small application that tries to launch a slide show for a set of pictures (jpg). It is implemented by a timed ajax routine to get the next picture filename and updating the image src field to show the next picture. The problem is that the actual down load varies significantly in time, based mostly on a clients access speed and the resolution size of the picture. Since all this happens asynchronously, the delay time routine gets invoked and is exhausted before the download is completed in many cases. Is there any way to start the new src coming and then detecting/waiting when it is complete?
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Apr 9, 2009
I'm having trouble showing a loading image between loads but only in IE.
Code:
function PreLoad(){
cookie = new Image();
cookie.src = "loading.gif";
[Code]....
When a user clicks the button it references ShowImage() - PreLoad is used when the body loads. This works find in Mozilla browsers, but not IE. How can I get the loading graphic to show in IE?
(ShowImage() loads a dynamically generated image, and there is a brief pause before it is show -- that's why I need the loading graphic). I've tried Google but to no avail.
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