使用CSS3，现在可以使用content属性很容易地设置标题属性的样式。这里是一个简短的演示：
CSS
a {
color: #900;
text-decoration: none;
}
a:hover {
color: red;
position: relative;
}
a[title]:hover:after {
content: attr(title);
padding: 4px 8px;
color: #333;
position: absolute;
left: 0;
top: 100%;
z-index: 20;
white-space: nowrap;
-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);
}