.tipLeft
{
    background: transparent url(images/tipLeft.png) no-repeat left;
    width: 31px;
    height: 210px;
    z-index:500;
}
.tipCenter
{
    background: transparent url(images/tipCenter.png) repeat-x;
    z-index:500;    
}
.tipRight
{
    width: 17px;
    overflow: hidden;
    background: transparent url(images/tipRight.png) no-repeat right;
    z-index:500;
}