Javascript Reference - HTML DOM Area alt Property

The alt property sets or gets the value of the alt attribute of an area.

Browser Support


`alt`	Yes	Yes	Yes	Yes	Yes

Syntax

Return the alt property:

var v = areaObject.alt;

Set the alt property:

areaObject.alt = text;

Property Values

Value	Description
text	The alternate text for the area

Return Value

A String representing an alternate text for the area.

Example

The following code shows how to get the alternate text of a specific area in an image-map.


<!DOCTYPE html>
<html>
<body>
<img src="http://java2s.com/style/demo/border.png" 
     width="145" height="126" usemap="#myImageMap">
<map name="myImageMap">
  <area id="myArea" shape="circle" coords="124,58,8" alt="an image" href="http://example.com">
</map><!--  www .j  a  v a2s. c o m-->
<p id="demo"></p>
<button onclick="myFunction()">test</button>
<script>
function myFunction() {
    var x = document.getElementById("myArea").alt;
    document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>

The code above is rendered as follows:

Example 2

The following code shows how to change the alternate text for a specific area in an image-map.


<!DOCTYPE html>
<html>
<body>
<!-- ww w.  j a  va2s .  co  m-->
<img src="http://java2s.com/style/demo/border.png" 
     width="145" height="126" usemap="#myImageMap">

<map name="myImageMap">
  <area id="myArea" shape="circle" coords="124,58,8" alt="An image" href="http://example.com">
</map>
<p id="demo"></p>
<button onclick="myFunction()">test</button>

<script>
function myFunction() {
    document.getElementById("myArea").alt = "your message";
    document.getElementById("demo").innerHTML = "changed";
}
</script>

</body>
</html>

The code above is rendered as follows: