[рони]

Paul_Wahtel,

var x = 0;
function upAndDown () {
        var lift = document.getElementById('lift');
	lift.style.marginBottom = x +"px";
x += 50;
	}			
function lift () {
	timer = window.setInterval("upAndDown()", 1000);
       }


<a href="javascript:lift()">
			button
		</a>