Edit in JSFiddle

<a href="#" title="jQuery Tooltip is Amazing !!">jQuery Tooltip</a> provides easy way to implement attractive tooltips.
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<label for="Age">Age :</label>
<input type="text" id="Age" title="Only above 20 are allowed" />

$(function () {
     $(document).tooltip({
         position: {
             my: "center bottom-20",
             at: "center top",
             using: function (position, feedback) {
                 $(this).css(position);
                 $("<div>")
                     .addClass("arrow")
                     .addClass(feedback.vertical)
                     .addClass(feedback.horizontal)
                     .appendTo(this);
             }
         }
     });
 });

.ui-tooltip, .arrow:after {
    background: black;
    border: 2px solid white;
}
.ui-tooltip {
    padding: 10px 20px;
    color: white;
    border-radius: 20px;
    font: bold 14px"Helvetica Neue", Sans-Serif;
    text-transform: uppercase;
    box-shadow: 0 0 7px black;
}
.arrow {
    width: 70px;
    height: 16px;
    overflow: hidden;
    position: absolute;
    left: 50%;
    margin-left: -35px;
    bottom: -16px;
}
.arrow.top {
    top: -16px;
    bottom: auto;
}
.arrow.left {
    left: 20%;
}
.arrow:after {
    content:"";
    position: absolute;
    left: 20px;
    top: -20px;
    width: 25px;
    height: 25px;
    box-shadow: 6px 5px 9px -9px black;
    -webkit-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    tranform: rotate(45deg);
}
.arrow.top:after {
    bottom: -20px;
    top: auto;
}