[Skipp]

Ну например так, на вскидку:

<div style="margin:50px 0 0 50px" id="run">*</div>

		<script type="text/javascript">
			window.onclick=function(){
				var runDiv=document.getElementById('run'), marginLeftRun=50, i=0, t = (new Date()).getTime();
				
				setTimeout(function(){
					i++;
					runDiv.style.marginLeft=marginLeftRun + (Math.floor(((new Date()).getTime() - t)/100) * 2) + 'px';
					if(i<100)setTimeout(arguments.callee,100)
				},100);
			}

		</script>