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<title>JavaScript Image Maps</title>
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<p>From <b>http://www.w3schools.com</b> (Copyright Refsnes Data)</p>
<h1>JavaScript Image Maps</h1><a href="js_animation.asp"><img alt="previous" border="0" src="../images/btn_previous.gif" width="100" height="20" /></a>
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<p class="intro">An image-map is an image with clickable regions.</p>
<hr />
<h2>Examples</h2>
<p><a target="_blank" href="tryit.asp@filename=tryjs_imagemap_simple">Simple HTML Image map</a></p>
<p><a target="_blank" href="tryit.asp@filename=tryjs_imagemap">Image map with added JavaScript</a></p>
<hr />
<h2>HTML Image Maps</h2>
<p>From our HTML tutorial we have learned that an image-map is an image with clickable regions. Normally, each region has an
associated hyperlink. Clicking on one of the regions takes you to the associated link.</p>
<h3>Example</h3>
<p>The example below demonstrates how to create an HTML image map, with clickable
regions. Each of the regions is a hyperlink:</p>
<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3">
<tr>
<td valign="top">
<pre><img src ="planets.gif"
width ="145" height ="126"
alt="Planets"
usemap ="#planetmap" /></pre>
<pre><map id ="planetmap"
name="planetmap">
<area shape ="rect" coords ="0,0,82,126"
href ="sun.htm" target ="_blank"
alt="Sun" />
<area shape ="circle" coords ="90,58,3"
href ="mercur.htm" target ="_blank"
alt="Mercury" />
<area shape ="circle" coords ="124,58,8"
href ="venus.htm" target ="_blank"
alt="Venus" />
</map> </pre>
</td>
</tr>
</table>
<h3>Result</h3>
<img src="planets.gif" width="145" height="126" usemap="#planetmap" alt="Planets" />
<map id="planetmap" name="planetmap">
<area shape="rect" coords="0,0,82,126" href="sun.htm" target="_blank" alt="Sun"></area>
<area shape="circle" coords="90,58,3" href="mercur.htm" target="_blank" alt="Mercury"></area>
<area shape="circle" coords="124,58,8" href="venus.htm" target="_blank" alt="Venus"></area>
</map>
<hr />
<h2>Adding some JavaScript</h2>
<p>We can add events (that can call a JavaScript) to the <area> tags inside the
image map. The <area> tag supports the onClick, onDblClick, onMouseDown,
onMouseUp, onMouseOver, onMouseMove, onMouseOut, onKeyPress, onKeyDown, onKeyUp,
onFocus, and onBlur events.</p>
<p>Here's the above example, with some JavaScript added:</p>
<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3" id="table14">
<tr>
<td valign="top">
<pre><html>
<head>
<script type="text/javascript">
function writeText(txt)
{
document.getElementById("desc").innerHTML=txt;
}
</script>
</head></pre>
<pre><body>
<img src="planets.gif" width="145" height="126"
alt="Planets" usemap="#planetmap" />
<map id ="planetmap" name="planetmap">
<area shape ="rect" coords ="0,0,82,126"
onMouseOver="writeText('The Sun and the gas giant
planets like Jupiter are by far the largest objects
in our Solar System.')"
href ="sun.htm" target ="_blank" alt="Sun" />
<area shape ="circle" coords ="90,58,3"
onMouseOver="writeText('The planet Mercury is very
difficult to study from the Earth because it is
always so close to the Sun.')"
href ="mercur.htm" target ="_blank" alt="Mercury" />
<area shape ="circle" coords ="124,58,8"
onMouseOver="writeText('Until the 1960s, Venus was
often considered a twin sister to the Earth because
Venus is the nearest planet to us, and because the
two planets seem to share many characteristics.')"
href ="venus.htm" target ="_blank" alt="Venus" />
</map>
<p id="desc"></p>
</body>
</html></pre>
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<p>From <b>http://www.w3schools.com</b> (Copyright Refsnes Data)</p>
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