.maincontentdiv {
  position: relative;
  height: 100px;
  width: 100%;
  -moz-border-radius: 15px;
  border-radius: 15px;
  overflow: hidden;
}
.slideup {
  position: absolute;
  width: 100%;
  bottom: -2px;
  min-height: 0;
  color: #FFF;
  transition: min-height 250ms ease-in;
  background-color: #666666;
  text-align: center;
  height: 20px;
  -moz-border-radius: 15px;
  border-radius: 15px;
}
.maincontentdiv:hover > .slideup,
.maincontentdiv:focus > .slideup {
  min-height: 65%;
}