<body>
<div id="number"></div>
</body>
<script type="text/javascript">
function magic_number(count) {
var num = $('#number'),start = 0;
num.animate({count: count}, {
duration: 1500,
step: function() {
if(start <= count){
num.text(parseInt(start++));
};
}
});
};
magic_number(100);
</script>
