<!DOCTYPE html>
<html>
<head>
<style>
button {
font-size:14px;
}
img {
position: relative;
height: 100px;
width:50%;
left : 400px
}
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
<button id="go1">» Animate Block1</button>
<button id="go2">» Animate Block2</button>
<button id="go3">» Animate Block2</button>
<button id="go4">» Animate Block4</button>
<br>
<img id="block2" src="http://ru.lookatcode.com/show/9648057958996398/img1-lg.jpg" alt="">
<script>
$("button").click(function () {
var i = $(this).index() + 1
$("#block2")
.animate({
width: "20%",
left: '-250px'
}, 800,'linear', function () {
$(this).attr({
src: "http://ru.lookatcode.com/show/9648057958996398/img" + i + "-lg.jpg"
})
}).animate({
width: "50%",
left: '400px'
}, 1500)
});
</script>
</body>
</html>