.tips {
   width:546px;
   height:676px; 
   position:absolute; 
   top:0px; 
   left:50%; 
   margin-left:-259px; 
   background-image:url(/imgs/tips.png);
   background-repeat: no-repeat;
}
.tips-close {
   width: 45px;
   height:45px;
   position: absolute;
   top: 0px;
   left: 0px;
   text-align: left;
   cursor: pointer;
   background-image:url(/imgs/spacer.png);
   background-repeat: repeat;
}