function setTransition(){
   if (document.all){
      showarea.filters.revealTrans.apply();
   }
}

function playTransition(){
   if (document.all)
      showarea.filters.revealTrans.play()
}
function showimg(index){
   if(index==1){
	   
       init++;
       if(init>=myimg.length) init=0;
   }
   else
   {
      init--;
       if(init<0) init=myimg.length-1;
   } 
   setimg(init);
}
function setimg(index){
   setTransition();
   document.getElementById("showarea").src=myimg[index];
   playTransition();
   document.getElementById("showarea").alt=mytag[index];	
   document.getElementById("phototitle").innerHTML=mytag[index];
   document.getElementById("photolink").href=myhref[index];
}