如果需要规定一个不规则点击区域可用map图像映射
<!doctype html> <html> <head> <meta charset="utf-8"> <title>map图像映射</title> </head> <body> <img src="3.jpg" border="0" usemap="#picmap" /> <map id="picmap" name="picmap"> <area shape="circle" coords="20,20,20" href="http://www.baidu.com" target="_blank" alt="123" /> <area shape="poly" coords="30,0,30,100,80,100" href="http://www.baidu.com" target="_blank" alt="456" /> </map> </body> </html>
原文：http://www.cnblogs.com/viva-yue/p/maplink.html