The rollover works on the image itself, changing from one image to another then back again, but the problem is that it the image also changes on each side of the image on rollover where there is blank space.
I know there it can be done better in CSS, but it is a school assignment and must be in javascript. Below is the code in HTML, then what I have for it in CSS
HTML
<script>
imageout=new Image();
imageout.src="Pics/Image1.jpg";
imageover=new Image();
imageover.src="Pics/Image2.jpg";
function image_out(){
document.images['imageout'].src="Pics/Image1.jpg";
}
function image_over(){
document.images['imageout'].src="Pics/Image2.jpg";
}
</script>
<a href="javascript-rollover-image-swap.htm" onmouseover="image_over();"
onmouseout="image_out();"><img src="Pics/Image1.jpg" class="center"
id="imageout" width="400" height="200" alt="JavaScript rollover. Image swap"></a>
CSS
.center {
display: block;
margin-left: auto;
margin-right: auto;
}
If someone can point out my error or if there is a better way to do this (must be javascript), I would certainly appreciate it!
As I have mentioned in the comment, block level elements will cover the entire row, So remove the class center from your anchor tag and If you want to align the items in middle then change your structure of html like below.
<div class="center">
<a href="javascript-rollover-image-swap.htm" onmouseover="image_over();"onmouseout="image_out();">
<img src="https://www.delecta.co.za/wp-content/uploads/sample.jpg" id="imageout" width="400" height="200" alt="JavaScript rollover. Image swap">
</a>
</div>
DEMO
more you ask, more knowledge you get. Right ? I don't know this question is basic or not but a little make me think hard.
Look pic 1 what do i have.
pic 1: http://imgur.com/YFpfo69
When i upload an image, it will show up to the container called <img id="image"/> and the image is horizontally draggable. My problem is, how do i hide the rest of unused image ? When i dragging the image, the rest will not showing up
To fix this you can place overflow: hidden in the CSS of the parent element of the #image element.
Add the style overflow: hidden; to the parent element, like this:
<div style="overflow: hidden;">
<img src="img.png" id="image" />
</div>
Screenreaders will read whatever string is set to the "alt" attribute. The use of this attribute is specifically for image tags.
If I have a div like so:
<div id=myCoolDiv tabindex="0"> 2 <div>
Is there a way to have a screen reader pickup an attribute to read a string the same way an alt tag is used?
So for the div listed below, the screen reader will say ie: "shopping cart items 2"?
I tried using aria-label but the screenreader won't pick it up:
<div id=myCoolDiv tabindex="0" aria-label="shopping cart items"> 2 <div>
You can just put a title tag in the div which will do the same as an alt tag like so:
<div title="I AM HELLO WORLD">HELLO WORLD</div>
"I AM HELLO WORLD" will be printed once you move your cursor around it on a browser
There are two ways (which can be combined) to have screen reader to read alternative text:
Anything with ARIA role img can (MUST) have alt attribute. See WAI-ARIA img role.
<div role="img" alt="heart">
♥︎
</div>
UPDATE: In 2017 the WAI-ARIA document was changed and the following text does not apply anymore. See comments below.
However this should be used only in case the element really represent an image (e.g. the heart unicode character).
If an element contain actual text, that just need different reading, you should set ARIA role to text and add aria-label with whatever you want to be read by the screen reader. See WAI-ARIA text role.
<div role="text" aria-label="Rating: 60%">
Rating: ★★★☆☆︎
</div>
Do not mismatch it with aria-labeledby which should contain ID of an related element.
You can combine the previous two cases into one using two ARIA roles and adding both alt and aria-label:
<div role="img text" alt="heart" aria-label="heart">
♥︎
</div>
When more ARIA roles are defined, browser should use the first one that is supported and process the element with that role.
One last important thing is that you must set page type to HTML5 (which support ARIA by design).
<!DOCTYPE html>
Using HTML4 or XHTML requires special DTD to enable ARIA support.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+ARIA 1.0//EN"
"http://www.w3.org/WAI/ARIA/schemata/xhtml-aria-1.dtd">
Try role="listitem" or role="group" and aria-labelledby="shopping cart items". See Example 1. The 2 is text content which should be read by screen reader already with the attribute read as context to the content. Refer to this section.
UPDATE 2
Add aria-readonly=true role=textbox if you use an input. If there are doubts whether to use aria-label or aria-labelledby, read this article. In the documentation for JAWS and testing it myself supports the fact that aria-label is ignored. Furthermore, semantics are very important when accessibility is your concern. Using a div when you could use an input is not semantically sound and like I said before, JAWS would accept a form element more readily than a div. I assume that this "shopping cart" is a form or part of a form, and if you don't like it's borders, input {border: 0 none transparent} or use <output>* which would be A+ as far as semantics are concerned.
Sorry, #RadekPech reminded me; I forgot to add that using aria-labelledby needs visible text and that the text needs an id which is also listed as the value(s) of aria-labelledby. If you don't want text because of aesthetics, use color: transparent, line-height: 0, or color:<same as background>. That should satisfy visibility as far as the DOM is concerned* and still be invisible to the naked eye. Keep in mind these measures are because JAWS ignores aria-label.
*untested
EXAMPLE 3
<span id="shopping">Shopping</span>
<span id="cart">Cart</span>
<span id="items">Items</span>
<input id='cart' tabindex="0" aria-readonly=true readonly role="textbox" aria-labelledby="shopping cart items" value='2'>
UPDATE 1
For JAWS, you probably have to configure it a little:
Click the Utilities menu item.
Then Settings Center.
Speech and Sounds Schemes
Modiy Scheme...
HTML Tab
In this particular dialog box, you can add specific attributes and what is said when an element is tabbed to. JAWS will respond to form elements easier because they can trigger the focus event. You'll have an easier time doing Example 2 instead:
EXAMPLE 1
<div id=myCoolDiv tabindex="0" role="listitem" aria-labelledby="shopping cart items"> 2 <div>
EXAMPLE 2
<input id='semantic' tabindex="0" role="listitem" aria-labelledby="shopping cart items" value='2' readonly>
In case you use Bootstrap Framework there is a quick and easy solution. You should use sr-only or sr-only sr-only-focusable Bootstrap's CSS classes in a span element where your screen-reader-only text will be written.
Check the following example, a span element with class glyphicon glyphicon-shopping-cart is also used as cart icon.
<div id="myCoolDiv">
<h5>
<span class="glyphicon glyphicon-shopping-cart"></span> 2
<span class="sr-only sr-only-focusable" tabindex="0">shopping cart items</span>
</h5>
<div>
Screen Reader Output: "two shopping cart items"
provided by Fangs Screen Reader Emulator Addon for Firefox
You can find the above working example in this: Fiddle
As suggested by Oriol, in case you don't use Bootstrap Framework then simply add the following in your CSS file.
.sr-only {
position: absolute;
width: 1px;
height: 1px;
padding: 0;
margin: -1px;
overflow: hidden;
clip: rect(0, 0, 0, 0);
border: 0;
}
.sr-only-focusable:active,
.sr-only-focusable:focus {
position: static;
width: auto;
height: auto;
margin: 0;
overflow: visible;
clip: auto;
}
According to the text alternative computation algorithm of the W3C and the
Accessible Name and Description: Computation and API Mappings 1.1 you definitely should use aria-label.
That being said, it does not work with Jaws. Text alternative is only computed for elements having an ARIA role.
The remaining option is to use a link that will go to your cart page, using both title and aria-label to satisfy anyone:
2
You can also use a transparent 1 pixel option:
2 <img src="pixel.png" height="1" width="1" alt="shopping cart items" />
No, there is no equivalent to an alt attribute for <div> elements.
For what you are trying to do, an ARIA-based solution is overkill. Not only are you bumping into screen reader compatibility problems, you are applying ARIA attributes where they are not needed (and arguably do not belong if on something like a <div>).
Instead, consider using an off-screen technique (such as this one from The Paciello Group or this one from WebAIM). Content hidden using this technique will still be read by screen readers but will be visually hidden.
From reading your question, I think this is what you are after.
I made a pen demonstrating this technique. It may be easier to test in the full-page version.
Edit: Added HTML and CSS from the example, but please note that both the specs and browser / assistive technology support change over time, so if you are reading this in a year you should continue to use the links above to verify this CSS is still the current best practice.
HTML
<div tabindex="0">
<span class="offscreen">Items in shopping cart: </span>2
</div>
CSS
.offscreen {
position: absolute;
clip: rect(1px 1px 1px 1px);
/* for Internet Explorer */
clip: rect(1px, 1px, 1px, 1px);
padding: 0;
border: 0;
height: 1px;
width: 1px;
overflow: hidden;
}
Accessibility (Screen readers) can be achieved through role and aria-label tags on div. This can be very useful while using svg.
<div role="img" aria-label="I can speak the text">
<svg>...</svg>
</div>
Try:
HTML
<div id=myCoolDiv tabindex="0"><span class="aria-hidden">shopping cart items</span>2<div>
CSS
.aria-hidden {
position: absolute;
left: -100000px;
}
This will announce the text inside the span. And the Parent div will not lose visual focus. Aria-hidden class will hide the span from the visible screen area but will read it as its inside the div that has focus.
You can create a class such as screen-reader-text with the following css:
.screen-reader-text {
clip: rect(1px, 1px, 1px, 1px);
height: 1px;
width: 1px;
overflow: hidden;
position: absolute !important;
}
Then, in your code, you can just add a <span> with the screenreader text as so:
<div>
I am a div!
<span class="screen-reader-text">This is my screen reader text</span>
</div>
See an example over here: https://jsfiddle.net/zj1zuk9y/
(Source: http://www.coolfields.co.uk/2016/05/text-for-screen-readers-only-updated/)
Use an image inside the div that has the label as its alt attribute. That way, those without screen readers just see the number and an image, whereas those with readers will hear the whole sentence:
<div>
<img src="http://tny.im/57j" alt="Shopping cart items" />
2
</div>
Seen as:
2
Read as: "Shopping cart items: 2"
The alt attribute exists for images because there is no way to "read aloud" the content of the image, so the provided text is used instead. But for the div, it already contains text and images. Therefore, if you want it to be read by a screen-reader, you need to include the text and alt text in the content of the div.
I've been using javascript (with a very limited knowledge) to swap images but now I want to do it with text.
My question is, if I have 10 different paragraphs (link 1 shows paragraph 1, link 2 shows paragraph 2 etc), I don't understand where I can 'type' them. My images obviously link to a ready made file but I want my text to remain as text and I'm not sure how I assign this in either CSS or HTML etc.
CODE USED:
So far I have my CSS code to define my text content (that I want to change depending on the clicking) and my map content where I'm controlling the change in text:
#content
#content div {float:left;}
#content_map {width:595px; height: 595px; margin-bottom: 15px; margin-right:15px;}
#content_text {width:290px; height: 595px; margin-bottom: 15px;}
#content_profile {width:900px; height: 755px; margin-bottom: 15px;}
So my html so far for the map 'hotspots' are as an example:
<area shape="circle" coords="276,326,15" href="#" alt="Kinnloch" onclick="MM_swapImage('stboswells_01','','discover_kinnloch.png',1)"/>
<area shape="circle" coords="202,264,11" href="#" alt="Lochinver" onclick="MM_swapImage('stboswells_01','','discover_lochinver.png',1)"/>
...
etc
so basically I'm swapping images in the 'profile' div by the coordinates on the 'map' div and what i want to do is use these coordinates to also swop in text in my 'text' div so the first set of coords would change my text div to say 'Discover Kinnloch' and the second set of coordinates would change my text div to say 'Discover Lochinver' etc...
It almost sounds like you want expanding sections.
You could have the content already in the html hidden by CSS, and show it via javascript. Here's an example using jQuery.
<div class="container">
Header 1
<p class="container-body">This is a test.</p>
</div>
<div class="container">
Header 2
<p class="container-body">This is another test.</p>
</div>
Hidden by CSS:
.container-body {
display: none;
}
And toggled by the JavaScript:
$(".container a").click(function () {
$(".container-body", $(this).parent()).slideToggle();
});
Here's a quick fiddle showing it in action: http://jsfiddle.net/yv9QG/
Alternatively, if you're talking about swapping text in a target space it's only a few minor changes and you end up with something like this: http://jsfiddle.net/yv9QG/1/
Hello I am trying to make status bar, which I add some image after previous image.
Let me explain it clear.
I have two image(gif). Guess white 10x10px and black 10x10px.
I use this tag <Img src='./black.gif> on my homepage.
and I want to put <Img src='./white.gif> after <Img src='./black.gif>.
finally it looks something like this
■□□■■□■□■
Is it possible to do using HTML? or any good idea?
---------add
thanks. Actually I can have more images, and it isn't fixed. For example, I want to append a image corresponding with the value like 1-3(green) 4-7(yellow) 8-10(red). And the data from highcharts dynamic update.
Solution 1 (preferred):
Why can't you just use the background-repeat property and use Photoshop to create a single image with the black and the white squares? IF you can't do this, see below for another solution.
Solution 2:
You can wrap the images in a div and give them a float: left:
HTML:
<div>
<div class="image_cont">
<img src="white.jpg" />
</div>
<div class="image_cont">
<img src="white.jpg" />
</div>
</div>
CSS:
.image_cont{
float: left; /* OR display: inline-block OR width: xx px */
}
Working Example (JSFiddle)
I found it with jQuery. The solution is to use "append" and wrap img with div container.
and
$('#image_status').append('');
wrap the images with a div container and assign an id to it i.e. (id) then use this css property:
div#id img{
display: inline-block;
}
jsfiddle