var first = 0;
function on() {
		f1 = document.getElementById("suwak");
		q = f1.style.marginTop.split("px");
		wartosc = Number(q[0]) + 35;
		if(first != 0) {
			f1.style.marginTop = wartosc + "px";
			first --;
		}
	}
function on2() {
		f1 = document.getElementById("suwak");
		q = f1.style.marginTop.split("px");
		wartosc = q[0] - 35;
		if(first < 10) {
			f1.style.marginTop = wartosc + "px";
			first ++;
		}
	}