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img usemap attribute China map link_HTML/Xhtml_web page production

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May 16, 2016 pm 04:42 PM

img

The img tag of html: defines an image to be introduced in the web page. It also has a usemap attribute that is very interesting.
Look at the map on the homepage of 51ditu, and there is a map of China in the middle. Right-click to download and take a look at an ordinary picture.
But clicking on a province on the map can trigger different events (or open different links), which is very interesting. It turns out that the usemap attribute is used.
Of course you also need to define a map tag. The entire code is as follows:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<title>img usemap attribute</title>
</head>
  
<body>
       
    <img src="http://img.jb51.net/maps/chinamap.gif" usemap="#Map" border="1"/>
       
    <map name="Map" class="maparea">
        <area shape="rect" coords="73,87,103,104" href="javascript:alert('Xinjiang')">
        <area shape="rect" coords="144,125,173,142" href="javascript:alert('Qinghai')">
        <area shape="rect" coords="84,158,115,175" href="javascript:alert('Tibet')">
        <area shape="rect" coords="220,90,257,105" href="javascript:alert('Inner Mongolia')">
        <area shape="rect" coords="348,45,389,61" href="javascript:alert('Heilongjiang')">
        <area shape="rect" coords="346,68,371,83" href="javascript:alert('Jilin')">
        <area shape="rect" coords="323,84,351,100" href="javascript:alert('Liaoning')">
        <area shape="rect" coords="298,100,326,114" href="javascript:alert('Tianjin')">
        <area shape="rect" coords="288,120,314,136" href="javascript:alert('Shandong')">
        <area shape="rect" coords="268,107,295,121" href="javascript:alert('Hebei')">
        <area shape="rect" coords="207,116,235,130" href="javascript:alert('Ningxia')">
        <area shape="rect" coords="186,162,214,179" href="javascript:alert('Sichuan')">
        <area shape="rect" coords="256,142,281,157" href="javascript:alert('Henan')">
        <area shape="rect" coords="305,144,332,159" href="javascript:alert('Jiangsu')">
        <area shape="rect" coords="320,162,342,177" href="javascript:alert('Shanghai')">
        <area shape="rect" coords="216,168,243,185" href="javascript:alert('Chongqing')">
        <area shape="rect" coords="250,162,277,177" href="javascript:alert('Hubei')">
        <area shape="rect" coords="283,161,308,177" href="javascript:alert('Anhui')">
        <area shape="rect" coords="213,196,239,209" href="javascript:alert('Guizhou')">
        <area shape="rect" coords="243,183,269,198" href="javascript:alert('Hunan')">
        <area shape="rect" coords="273,185,299,200" href="javascript:alert('Jiangxi')">
        <area shape="rect" coords="308,177,334,193" href="javascript:alert('Zhejiang')">
        <area shape="rect" coords="179,210,204,225" href="javascript:alert('Yunnan')">
        <area shape="rect" coords="227,214,252,228" href="javascript:alert('Guangxi')">
        <area shape="rect" coords="231,248,257,263" href="javascript:alert('Hainan')">
        <area shape="rect" coords="292,200,319,214" href="javascript:alert('Fujian')">
        <area shape="rect" coords="259,219,287,231" href="javascript:alert('Guangdong')">
        <area shape="rect" coords="244,231,270,246" href="javascript:alert('Macau')">
        <area shape="rect" coords="276,232,304,248" href="javascript:alert('Hong Kong')">
        <area shape="rect" coords="311,228,338,243" href="javascript:alert('Taiwan')">
        <area shape="rect" coords="272,90,302,107" href="javascript:alert('Beijing')">
        <area shape="rect" coords="196,130,222,145" href="javascript:alert('Gansu')">
        <area shape="rect" coords="246,116,272,130" href="javascript:alert('Shanxi')">
        <area shape="rect" coords="224,136,252,151" href="javascript:alert('Shaanxi')">
    </map>
</body>
</html>

Tip: You can modify part of the code before running
For the meaning of several attributes of the area tag in the map tag, please see: http://www.w3school.com.cn/tags/tag_area.asp

It is better to note down the shape attribute of the area here, which is optional. There are rectangles, circles and polygons. Special attention should be paid to the coords attribute, which must be used in conjunction with shape. The coordinates of the upper left corner of the image are "0,0".

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