var rector=2
var stopit=0 
var a=1

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

function rattleimage()
{
  if ((!document.all && !document.getElementById) || stopit==1) return
  if (a==1) { shake.style.top = parseInt(shake.style.top)+rector; }
  else if (a==2) { shake.style.left = parseInt(shake.style.left)+rector; }
       else if (a==3) { shake.style.top = parseInt(shake.style.top)-rector; }
            else      { shake.style.left = parseInt(shake.style.left)-rector; }
  if (a<4) a++; else a=1;
  setTimeout("rattleimage()",100)
}

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