var htmax=100;

var htmin=0;

var wdmax=150;          

var wdmin=0;            

var inc=5;             

var rate = 20;          

var pause = 500;      

var ff="flip";          

                        

function flipflop() {

 if (ff=="flip") {

  var wd = document.getElementById("etiquette").getAttribute("width");

  wd = wd - inc;

  document.getElementById("etiquette").setAttribute("width",wd);

  if (wd==wdmin) {

   document.getElementById("etiquette").setAttribute("src","images/pub2.GIF"); //substitute name of your second picture

   inc=-inc;

   }

  if (wd==wdmax) {

   ff="flop";

   inc=-inc;

   setTimeout("flipflop()",pause);

   }

   else {

   setTimeout("flipflop()",rate);

   }

  }

 else {

  var ht = document.getElementById("etiquette").getAttribute("height");

  ht = ht - inc;

  document.getElementById("etiquette").setAttribute("height",ht);

  if (ht==htmin) {

   document.getElementById("etiquette").setAttribute("src","images/pubmotobis.jpg"); //substitute name of your first picture

   inc=-inc;

   } 

  if (ht==htmax) {

   ff="flip";

   inc=-inc;

   setTimeout("flipflop()",pause);

   }

   else {

   setTimeout("flipflop()",rate);

   }

  }

}