具有[title]属性的元素的样式工具提示

Question

如何为具有[tittle]的元素设置工具提示的样式，以便在IE8上工作。

这里有一些小提琴示例：     http://jsfiddle.net/Dqr76/9/

a[title]:hover:after {
  content: attr(title);
  padding: 4px 8px;
  color: #333;
  position: absolute;
  left: 0;
  top: 100%;
  white-space: nowrap;
  z-index: 20px;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  border-radius: 5px;
  -moz-box-shadow: 0px 0px 4px #222;
  -webkit-box-shadow: 0px 0px 4px #222;
  box-shadow: 0px 0px 4px #222;
  background-image: -moz-linear-gradient(top, #eeeeee, #cccccc);
  background-image: -webkit-gradient(linear,left top,left bottom,color-stop(0, #eeeeee),color-stop(1, #cccccc));
  background-image: -webkit-linear-gradient(top, #eeeeee, #cccccc);
  background-image: -moz-linear-gradient(top, #eeeeee, #cccccc);
  background-image: -ms-linear-gradient(top, #eeeeee, #cccccc);
  background-image: -o-linear-gradient(top, #eeeeee, #cccccc);
}

http://jsfiddle.net/tDQWN/

a[data]:hover:after {
  content: attr(data);
  padding: 4px 8px;
  color: rgba(0,0,0,0.5);
  position: absolute;
  left: 0;
  top: 100%;
  white-space: nowrap;
  z-index: 2;
  border-radius: 5px ;
  background: rgba(0,0,0,0.5);
}

如何让它们在IE8上运行？

谢谢！