[bes]

<style>
	div {
		border: solid 1px;
		width: 50px;
		height: 50px;
	}
</style>

<div id="div" style="position: absolute; top: 0px; left: 0px; border: none; ">
	<button>click</button>
	<div>div1</div>
	<div>div2</div>
	<div>div3</div>
</div>

<script>
window.onload = function () {
	var div = document.getElementById('div');
	var but = div.children[0];
	
	but.onclick = function () {
		var count = 200;
		var step = 6;
		var coof = 1;
		var goLeft = function (elem) {
			elem.style.left = parseInt(elem.style.left) + step;
		}
		for (var i = 0; i < count; i += step) {
			setTimeout(function () {goLeft(div)}, i*coof);
		}
	}
  
}
</script>