Here is the html structure for tooltip
[php][/php]

[php][/php]

And here is the css styles

[php][/php]/* base CSS element */
.tip {
background: #eee;
border: 1px solid #ccc;
padding: 10px;
border-radius: 8px;
box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
position: relative;
width: 200px;
}

/* arrows – :before and :after */
.tip:before {
position: absolute;
display: inline-block;
border-top: 7px solid transparent;
border-right: 7px solid #eee;
border-bottom: 7px solid transparent;
border-right-color: rgba(0, 0, 0, 0.2);
left: -14px;
top: 20px;
content: ”;
}

.tip:after {
position: absolute;
display: inline-block;
border-top: 6px solid transparent;
border-right: 6px solid #eee;
border-bottom: 6px solid transparent;
left: -12px;
top: 21px;
content: ”;
}[php][/php]

Source: http://davidwalsh.name/css…