function swap_image()
{
  var i,j=0,x,a=swap_image.arguments;
  document.sr=new Array;
  for(i=0;i<(a.length-2);
    i+=3) if ((x=find_object(a[i]))!=null)
    {
      document.sr[j++]=x;
      if(!x.osrc) x.osrc=x.src;
      x.src=a[i+2];
    }
}