function rotateBack(){
clearInterval(rotate_timer);
if(last==0){last = 3;}else{last--;}
rotate(last);
}//end func

function rotateForward(){
clearInterval(rotate_timer);
if(last==3){last = 0;}else{last++;}
rotate(last);
}//end func

function rotatePlay(){
if(last==3){toggle = 0;}
rotate_timer = setInterval("toggleFlip()",3000);
}//end func