// timeout = window.setTimeout('dobla()',5000);

function dobla()
	{
	wert = parseInt(document.getElementById("div-unten-bg").style.bottom);

	if(wert>=-100)
		{
		document.getElementById("div-unten-bg").style.bottom = wert - 5 + "px";
		timeout = window.setTimeout('dobla()',7);
		}

	if(wert<=-100 && wert>=-120)
		{
		document.getElementById("div-unten-bg").style.bottom = wert - 2 + "px";
		timeout = window.setTimeout('dobla()',7);
		}

	if(wert<=-120)
		{
		document.getElementById("div-unten-bg").style.bottom = wert - 1 + "px";
		timeout = window.setTimeout('dobla()',7);
		}

	if(wert<=-140)
		{
		document.getElementById("div-unten-bg").style.bottom = -140 + "px";
		clearTimeout("timeout");
		}
	}