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ES6 - Image Map
ES6 - Image Map
You can use JavaScript to create a cpent-side image map. Cpent-side image maps are enabled by the usemap attribute for the <img /> tag and defined by special <map> and <area> extension tags.
The image that is going to form the map is inserted into the page using the <img /> element as normal, except that it carries an extra attribute called usemap. The value of the usemap attribute is the value of the name attribute on the <map> element, which you are about to meet, preceded by a pound or a hash sign.
The <map> element actually creates the map for the image and usually follows directly after the <img /> element. It acts as a container for the <area /> elements that actually define the cpckable hotspots. The <map> element carries only one attribute, the name attribute, which is the name that identifies the map. This is how the <img /> element knows which <map> element to use.
The <area> element specifies the shape and the coordinates that define the boundaries of each cpckable hotspot.
The following code combines imagemaps and JavaScript to produce a message in a text box when the mouse is moved over different parts of an image.
<html>
<head>
<title>Using JavaScript Image Map</title>
<script type="text/javascript">
<!--
function showTutorial(name) {
document.myform.stage.value = name
}
//
-->
</script>
</head>
<body>
<form name = "myform">
<input type = "text" name = "stage" size = "20" />
</form>
<!-- Create Mappings -->
<img src = "//images/usemap.gif" alt = "HTML Map"
border = "0" usemap = "#tutorials"/>
<map name = "tutorials">
<area shape = "poly"
coords = "74,0,113,29,98,72,52,72,38,27"
href = "/perl/index.htm" alt = "Perl Tutorial"
target = "_self"
onMouseOver = "showTutorial( perl )"
onMouseOut = "showTutorial( )"/>
<area shape = "rect"
coords = "22,83,126,125"
href = "/html/index.htm" alt = "HTML Tutorial" target = "_self"
onMouseOver = "showTutorial( html )"
onMouseOut = "showTutorial( )"/>
<area shape = "circle" coords = "73,168,32"
href = "/php/index.htm" alt = "PHP Tutorial" target = "_self"
onMouseOver = "showTutorial( php )"
onMouseOut = "showTutorial( )"/>
</map>
</body>
</html>
The following output is displayed on successful execution of the above code. You can feel the map concept by placing the mouse cursor on the image object.
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