关于使用Html5 canvas、 map、jquery构造不规则变色点击区域 热点区域

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script src="JS/jquery-1.4.1.min.js" type="text/javascript"></script>
    <style type="text/css">
        * { margin:0; padding:0; text-align:center;}
        body {TEXT-ALIGN: center;}
        #center { MARGIN-RIGHT: auto; MARGIN-LEFT: auto; }
    </style>
    <script type="text/javascript">
        $(document).ready(function () {
            var canvers = document.getElementById("diagonal");
            var context = canvers.getContext("2d");
            context.globalAlpha = 0.5;

            $("#Map area").each(function () {
                $(this).mouseover(function () {

                    context.beginPath();
                    var strs = new Array(); //定义一数组
                    strs = $(this).attr("coords").split(",");
                    var i1, i2;
                    for (var i = 0; i < strs.length; i++) {
                        if (i % 2 == 0) {
                            i1 = strs[i];
                        }
                        if (i % 2 == 1) {
                            i2 = strs[i];
                            if (i == 1) {
                                context.moveTo(i1, i2);
                            }
                            else {
                                context.lineTo(i1, i2);
                            }
                        }
                    }
                    context.fillStyle = "#C0C0C0";
                    context.fill();

                    context.closePath(); //闭合
                });
                $(this).mouseout(function () {
                    context.clearRect(0, 0, 750, 528);
                });
            });
        });
    </script>
</head>
<body>
    <div id="center" style="width:750px;">
        <div style="display: block; background: url('Images/map.png') repeat scroll 0% 0% transparent; padding: 0px; width: 750px; height: 528px; position: relative;">
            <canvas id="diagonal" style="border:0px none;top:0px;left:0;position:absolute; padding: 0px; opacity: 1;" width="750px" height="528px"></canvas>
            <img src="data:images/map.png" width="750px" usemap="#Map" style="border: 0px none;position:absolute;left:0;top:0;opacity:0;"/>
            <map id="Map" name="Map">
                <area alt="北部区域" href="#" data_ID="1" coords="564,222,552,229,545,243,545,248,523,249,518,240,521,238,523,235,525,227,522,224,521,207,526,207,526,200,523,194,524,189,520,185,486,147,486,144,483,142,484,134,488,130,493,130,497,132,507,132,518,122,527,121,535,116,538,111,541,109,546,109,551,103,556,104,564,101,569,104,575,104,575,97,570,92,566,92,561,86,553,86,549,89,533,90,531,92,527,90,528,80,530,72,535,61,540,61,541,63,548,63,552,59,556,59,565,54,565,51,562,48,564,46,565,42,569,38,570,31,575,21,576,13,572,10,582,2,596,6,605,7,608,9,612,13,612,15,620,22,627,20,633,18,637,23,645,33,649,34,649,41,652,44,653,51,655,53,662,52,670,51,677,52,681,56,684,56,688,62,692,64,694,71,704,71,707,68,711,68,722,59,736,54,736,67,733,73,733,87,730,106,720,105,713,106,710,110,709,116,714,121,716,137,714,139,711,141,709,145,706,145,704,141,700,142,700,150,697,152,695,155,685,157,685,161,688,163,687,167,673,167,670,162,667,163,666,165,665,170,659,179,652,182,647,189,645,192,639,194,635,197,624,201,616,209,608,210,608,208,611,206,610,198,615,195,611,181,603,182,597,188,595,193,589,196,582,197,581,202,580,207,579,209,563,209,562,212,561,217" shape="poly">
                <area alt="东部区域" href="#" data_ID="2" coords="582,424,584,417,566,411,566,415,547,414,544,416,542,412,546,407,535,403,535,393,532,384,527,377,529,369,533,363,532,351,538,345,547,344,550,339,561,338,561,331,558,329,558,320,551,319,551,316,556,307,557,304,554,299,549,299,543,292,550,283,553,277,560,280,563,277,563,272,559,272,560,270,561,264,565,266,570,266,582,268,585,270,589,270,590,268,598,273,608,278,612,289,606,294,607,298,611,300,620,300,632,309,621,310,611,307,628,316,623,322,627,324,623,329,612,332,631,333,637,337,631,343,637,344,631,347,633,352,633,355,637,360,626,359,626,367,622,369,621,374,617,377,619,381,614,385,608,381,614,389,610,402,604,411,596,409,596,414,589,414,590,422" shape="poly">
                <area alt="西部区域" href="#" data_ID="3" coords="17,147,21,144,19,136,26,135,32,126,39,126,40,122,43,125,49,125,50,129,54,132,62,128,73,125,84,120,98,120,108,120,114,111,124,103,122,97,123,87,120,79,131,79,139,83,144,80,150,84,152,75,166,60,172,64,181,66,191,69,195,57,201,49,208,50,217,42,225,43,225,52,243,69,251,79,253,86,245,100,248,108,263,111,275,114,285,123,294,127,295,133,303,148,316,151,328,152,335,155,348,156,359,157,391,171,400,171,404,174,423,167,437,162,448,165,458,163,468,162,487,147,519,186,510,190,506,193,500,192,497,196,487,200,485,204,478,202,473,205,469,205,456,221,456,225,450,228,442,225,438,225,435,224,429,233,439,242,444,242,456,246,451,251,453,256,446,258,441,262,437,266,429,265,423,269,422,283,420,286,415,287,414,293,420,297,429,296,436,303,444,303,447,306,454,304,459,308,466,312,476,322,472,330,462,328,455,332,458,336,459,343,467,348,464,354,461,358,464,353,458,366,451,358,452,353,446,353,440,349,435,352,427,352,421,358,417,356,413,360,420,367,415,371,407,370,405,370,405,367,402,365,399,366,395,363,390,367,388,358,381,356,379,361,375,365,375,371,368,375,367,392,360,391,356,393,347,383,346,377,337,369,336,363,329,361,322,350,319,352,317,356,315,352,314,347,308,345,307,351,300,358,296,358,295,353,289,354,287,361,281,360,271,353,265,351,247,359,240,358,236,362,235,363,235,366,228,368,222,364,217,362,210,362,209,355,204,352,203,346,193,346,184,339,180,338,170,343,170,350,166,350,163,346,163,344,166,339,165,338,159,337,159,340,156,340,155,338,141,338,137,331,134,331,134,334,130,334,130,330,128,330,127,332,124,332,123,328,120,325,117,324,117,322,115,322,115,319,116,318,110,317,108,312,103,306,100,306,97,308,94,307,108,312,103,306,100,306,97,308,94,306,95,303,84,292,83,288,77,284,73,283,70,288,67,288,58,275,55,276,54,271,47,266,43,263,44,259,45,252,43,250,42,248,43,244,47,241,48,246,53,246,56,241,54,232,54,225,61,222,56,217,54,210,54,201,46,202,41,197,32,190,32,184,35,181,19,170,27,162,27,155,30,151,27,149,25,146,18,146" shape="poly">
                <area alt="南部区域" href="#" data_ID="4" coords="532,351,529,343,525,343,521,345,518,344,515,339,511,340,509,340,504,335,500,336,496,339,493,339,492,337,487,337,481,343,479,342,473,342,467,348,464,354,461,358,464,353,458,366,451,358,452,353,446,353,440,349,435,352,427,352,421,358,417,356,413,360,420,367,415,371,407,370,405,370,405,367,402,365,399,366,395,363,390,367,388,358,381,356,379,361,375,365,375,371,368,375,367,392,360,391,356,393,347,383,346,377,337,369,336,363,329,361,322,350,319,352,317,356,315,352,314,347,308,345,307,351,300,358,296,358,296,362,301,362,304,366,304,381,301,384,301,388,284,404,285,410,283,415,290,411,299,411,299,424,301,427,309,427,303,437,303,441,312,442,319,452,326,452,327,449,333,449,333,458,343,458,343,449,342,441,352,441,355,437,358,440,364,440,368,438,378,441,378,437,387,438,395,432,408,438,420,438,419,443,416,449,437,458,444,458,448,455,454,458,460,458,467,459,465,469,468,472,469,475,461,479,458,482,448,488,449,496,462,503,479,496,479,488,484,480,477,475,477,471,473,466,488,459,496,458,499,454,504,455,504,452,514,452,514,450,523,450,522,439,529,447,536,447,540,441,544,444,546,441,552,438,568,436,582,424,584,417,566,411,566,415,547,414,544,416,542,412,546,407,535,403,535,393,532,384,527,377,529,369,533,363" shape="poly">
                <area alt="中部区域" href="#" data_ID="5" coords="519,186,510,190,506,193,500,192,497,196,487,200,485,204,478,202,473,205,469,205,456,221,456,225,450,228,442,225,438,225,435,224,429,233,439,242,444,242,456,246,451,251,453,256,446,258,441,262,437,266,429,265,423,269,422,283,420,286,415,287,414,293,420,297,429,296,436,303,444,303,447,306,454,304,459,308,466,312,476,322,472,330,462,328,455,332,458,336,459,343,467,348,473,342,479,342,481,343,487,337,492,337,493,339,496,339,500,336,504,335,509,340,511,340,515,339,518,344,521,345,525,343,529,343,532,351,538,345,547,344,550,339,561,338,561,331,558,329,558,320,551,319,551,316,556,307,557,304,554,299,549,299,543,292,550,283,553,277,560,280,563,277,563,272,559,272,560,270,561,264,565,266,570,266,582,268,585,270,589,270,590,268,591,262,606,247,619,236,628,235,629,230,621,230,617,231,613,229,600,228,592,238,585,238,581,234,582,225,573,225,565,226,564,222,552,229,545,243,545,248,523,249,518,240,521,238,523,235,525,227,522,224,521,207,526,207,526,200,523,194,524,189,520,185" shape="poly">
            </map>
        </div>
    </div>
</body>
</html>