.tab{ 
     overflow:hidden; 
	 width:555px;  
	 height:150px; 
	 border:0px solid #ffffff;
  }    
  .tab .tab_title{  
     height:20px;  
	 width:600px;
  }    
  .tab .tab_title ul{ 
     overflow:hidden;
  }    
  .tab .tab_title li{ 
     float:left; 
	 height:20px;
  }    
  .tab .tab_title li a{ 
     float:left; 
	 width:150px; 
	 height:20px; 
	 line-height:20px; 
	 font-size:12px; 
	 font-weight:bold; 
	 text-align:center; 
	 color:#000000; 
  }    
  .tab .tab_title li.active a{
     border:0px solid #ffffff;
	 border-bottom:none; 
	 background:#ffffff; 
	 text-decoration:none; 
	 line-height:20px; 
	 width:120px; 
	 color:#000000;
  }    
  .tab .tab_box{ 
     overflow:hidden; 
	 padding:0px;
  }    
  .tab .tab_box .tab_box_content{ 
     display:none;
  }