google calendar里的气泡形状的信息框是怎么实现的?
就是四角都是圆弧,下面伸出一个箭头的类似气泡的信息框. 
 我觉得应该不是VML或者SVG,因为我的FF没装什么插件也能同IE一样显示;好像也不像是图片拼出来的...
------解决方案--------------------拐角全是png透明图
------解决方案-------------------- <html>  
  <head>  
  <title> css圆角效果--七度空间网页教学网 </title>  
  <meta http-equiv= "content-type " content= "text/html; charset=gb2312 ">  
  <style type= "text/css ">  
 div.RoundedCorner{display:inline;background: #9BD1FA;width:200px;text-align:center} 
 b.rtop, b.rbottom{display:block;background: #FFF} 
 b.rtop b, b.rbottom b{display:block;height: 1px;overflow: hidden; background: #9BD1FA} 
 b.r1{margin: 0 5px} 
 b.r2{margin: 0 3px} 
 b.r3{margin: 0 2px} 
 b.rtop b.r4, b.rbottom b.r4{margin: 0 1px;height: 2px} 
 .right{ 
 	display:inline; 
 	width:100px; 
 	padding:10px 10px 10px 0px; 
 } 
  .emborder1{ 
   display:block; 
   border-width:10px 0px 10px 30px;  
   border-style:solid;  
   border-color: #FFF #FFF #FFF #9BD1FA;  
   } 
  </style>  
  </head>  
  <body>  
  <div class= "RoundedCorner ">  
  <b class= "rtop ">  <b class= "r1 ">  </b>  <b class= "r2 ">  </b>  <b class= "r3 ">  </b>  <b class= "r4 ">  </b>  </b>  
  <br> 你要的是这样的吗? <br>  <br>  
  <b class= "rbottom ">  <b class= "r4 ">  </b>  <b class= "r3 ">  </b>  <b class= "r2 ">  </b>  <b class= "r1 ">  </b>  </b>  
  </div>  
  <div class= "right ">  <em class= "emborder1 ">  </em>   </div>  
  </body>  
  </html>