IE9中区域标签上没有焦点矩形

| 当我在下面的图像映射中的元素之间进行制表时,我发现IE9中没有显示我的焦点矩形。该选项卡仍然可以正常工作,并且焦点在Chrome中显示为“确定”。
<img name=\"scr5diagram\" src=\"scr5-diagram.gif\" width=\"909\" height=\"600\" id=\"scr5diagram\" usemap=\"#m_scr5diagram\" alt=\"Interactive diagram showing areas of focus\" />
<map name=\"m_scr5diagram\" id=\"m_scr5diagram\">
    <area href=\"#\" class=\"fader\" id=\"s5b1\" shape=\"poly\" coords=\"35,32,157,32,159,33,160,35,160,125,159,127,157,128,35,128,33,127,32,125,32,35,33,33,35,32,35,32\" alt=\"\" />
    <area href=\"#\" class=\"fader\" id=\"s5b2\" shape=\"poly\" coords=\"259,32,381,32,383,33,384,35,384,125,383,127,381,128,259,128,257,127,256,125,256,35,257,33,259,32,259,32\" alt=\"\" />
    <area href=\"#\" class=\"fader\" id=\"s5b3\" shape=\"poly\" coords=\"483,32,605,32,607,33,608,35,608,125,607,127,605,128,483,128,481,127,480,125,480,35,481,33,483,32,483,32\" alt=\"\" />
</map>
请帮忙。谢谢。     
已邀请:
        根据HTML规范:   第一个x和y坐标对与最后一个对应该相同以关闭多边形。当这些坐标值不同时,用户代理应推断出另一个坐标对以关闭多边形。 尝试使用其他工具生成坐标。以下测试在IE9中有效:
<!doctype html>
<html lang=\"en\">
<head>
    <title>Poly Rectangle Test</title>
</head>
<body>
<img id=\"stackoverflow\" name=\"stackoverflow\" src=\"http://www.stackoverflow.com/favicon.ico\" width=\"32\" height=\"32\" usemap=\"#stackmap\" alt=\"stackoverflow.com\"/>
<map id=\"stackmap\" name=\"stackmap\">
    <area href=\"http://www.stackoverflow.com\" shape=\"poly\" coords=\"0,16,16,0\" alt=\"Point one\"/>
    <area href=\"http://www.stackoverflow.com\" shape=\"poly\" coords=\"16,16,16,0\" alt=\"Point two\"/>
    <area href=\"http://www.stackoverflow.com\" shape=\"poly\" coords=\"0,0,16,16\" alt=\"Point three\"/>
    <area href=\"http://www.stackoverflow.com\" shape=\"poly\" coords=\"0,16,16,16\" alt=\"Point four\"/>
</map>
</body>
</html>
    

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