lettersoupanimchar = 0

function moveLetterSoup() 
{
	lettersoupanimchar = (lettersoupanimchar + 1) % 80;
	var lnum = Math.random()*80;
	var _id = "letterssp"+lettersoupanimchar.toString();
	
	$(_id).style.top = $(_id).offsetTop+3-Math.random()*6+"px";
	$(_id).style.left = $(_id).offsetLeft+3-Math.random()*6+"px";
}

new PeriodicalExecuter(function(pe) {
  moveLetterSoup();
  moveLetterSoup();
  moveLetterSoup();
  moveLetterSoup();
}, 0.1);