<!DOCTYPE html>
<html>
<head>
<title>jQuery animate function</title>
<script src="jquery-latest.min.js"></script>
<script>
$(document).ready(function() {
$("#btn1").click(function(){
$("#divanimate").animate({fontSize: "25px"});
});
$("#btn2").click(function(){
$("#divanimate").animate({fontSize: "15px"});
});
});
</script>
</head>
<body>
<button id="btn1">Animate Start</button>
<button id="btn2">Animate Stop</button>
<div id="divanimate" style="background: pink; font-size:15px; font-family: 'Arial';">When start animation font size and font family will be change.</div>
</body>
</html>