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JavaScript 中的 JS Image Maps
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An image-map is an image with clickable regions.
图象映象是图片的可点区域（一图片多个链接区）
Examples
举例
Simple HTML Image map[简单的图象映象]
Image map with added JavaScript[添加JS的图象映象（多了文字的说明）]
HTML Image Maps
HTML 图象映象
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.
从HTML教程我们已经学过图象映象是图象中可点击的区域。通常每个区域都有一个相关的链接。点击后会带你去相关的连接上。
Example
举例
The example below demonstrates how to create an HTML image map, with clickable regions. Each of the regions is a hyperlink:
下面的例子演示了怎样建立一个HTML图象映象：
<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" 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> |
Result结果
Adding some JavaScript
添加一些JS
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.
我们给图片内的<area>标签里面添加一些事件（可以叫JS）。<area>标签支持onClick,onDblClick,onMouseDown,onMouseUP,onMouseOver,onMouseMove, onMouseOut, onKeyPress, onKeyDown, onKeyUp, onFocus, 和 onBlur事件
Here's the above example, with some JavaScript added:
给上面的例子加入以下JS：
<html>
<head>
<script type="text/javascript">
function writeText(txt)
{
document.getElementById("desc").innerHTML=txt
}
</script>
</head> <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> |
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