function swapImgRestore() { //v3.0
  var i,x,a=document._sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function swapImage() { //v3.0
  var i,j=0,x,a=swapImage.arguments;
  document._sr=new Array;
  for(i=0;i<(a.length-1);i+=2)
  if ((x=document.getElementById(a[i]))!=null)
    {
    document._sr[j++]=x;
    if(!x.oSrc) x.oSrc=x.src; x.src=a[i+1];
    }
}