CSS图片映射,IE和FF不兼容问题
代码: 
  <!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>  
  <meta   http-equiv= "Content-Type "   content= "text/html;   charset=gb2312 "   />  
  <title> 无标题文档 </title>  
  <style   type= "text/css ">  
 #pic{ 
 	width:400px; 
 	height:300px; 
 	position:relative; 
 } 
 #pic   ul{ 
 	margin:0px; 
 	height:0px; 
 	list-style-type:none; 
 } 
 #pic   a{ 
 	position:absolute; 
 	color:#000; 
 	display:block; 
 	text-decoration:none; 
 	width:100px; 
 	height:100px; 
 	border:1px   solid   #00ff00; 
 } 
 #pic   a:hover{ 
 	border:1px   solid   #ff0000; 
 } 
 #pic   .one   a{ 
 	top:15px; 
 	left:20px; 
 } 
 #pic   .two   a{ 
 	top:86px; 
 	left:182px; 
 } 
 #pic   .three   a{ 
 	top:208px; 
 	left:237px; 
 } 
  </style>  
  <script   type= "text/javascript ">  
  </script>  
  </head>  
  <body>  
  <div   id= "pic ">  
  <img   src= "test.jpg "   width= "400 "   height= "300 "   border= "0 "   />  
 	 <ul>  
 		 <li   class= "one ">  <a   href= "# "> 第一个热点 </a>  </li>  
 		 <li   class= "two ">  <a   href= "# "> 第二个热点 </a>  </li>  
 		 <li   class= "three ">  <a   href= "# "> 第三个热点 </a>  </li>  
 	 </ul>  
  </div>  
  </body>  
  </html>    
 注: 
 测试时请注意图片地址 
 问题: 
 链接块的空处(无文字处)在IE6.0中为什么点击无效,怎么解决? 
 FF中正常
------解决方案--------------------给a加个背景 
 #pic a{ 
 background:#fff; 
 position:absolute; 
 color:#000; 
 display:block; 
 text-decoration:none; 
 width:100px; 
 height:100px; 
 border:1px solid #00ff00; 
 } 
------解决方案--------------------方法可以如楼上所说!
------解决方案--------------------改变下zIndex值就可以了。。 
 storm0(飘零雾雨.闻弦歌而知雅意,顾叶落而晓秋至)  
 code修改如下。。   
  <!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>  
  <meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 " />  
  <title> 无标题文档 </title>  
  <style type= "text/css ">  
 #pic{ 
 	width:400px; 
 	height:300px; 
 } 
 #pic img { 
 	border:none; 
 	width:400px; 
 	height:300px; 
 	position:absolute; 
 	z-index:1; 
 } 
 #pic ul { 
 	margin:0; 
 	height:0; 
 	list-style:none; 
 	position:absolute; 
 	z-index:2; 
 } 
 #pic a { 
 	position:absolute; 
 	text-decoration:none; 
 	width:100px; 
 	height:100px; 
 	border:1px solid #00ff00; 
 } 
 #pic a:hover { 
 	border:1px solid #ff0000; 
 } 
 #pic .one a { 
 	top:15px; 
 	left:20px; 
 } 
 #pic .two a { 
 	top:100px; 
 	left:150px; 
 } 
 #pic .three a {