var amp = 3;
var stopit = 0;
var a = 1;

function init(which){
	stopit = 0;
	shake = which;
	shake.style.left = 0;
	shake.style.top = 0;
}

function rattleimage(which){
	shake = which;
	if (a==1){
		shake.style.top = parseInt(shake.style.top)
		 + amp;
	}
	else if (a==2){
		shake.style.left = parseInt(shake.style.left) 
		 + amp;
	}
	else if (a==3){
		shake.style.top = parseInt(shake.style.top)
		 - amp;
	}
	else {
		shake.style.left = parseInt(shake.style.left)
		 - amp;
	}
	if (a!=4) a++ ; else a = 1;
	if (!stopit) setTimeout("rattleimage(shake)",50);
}

function stoprattle(which){
	stopit = 1;
	which.style.left = 0;
	which.style.top = 0;
}