var NowFrame = 1;
var MaxFrame = 3;
function show(d1) {
	if(Number(d1)){
		clearTimeout(theTimer);  
		NowFrame=d1;                
	}
	for(var i=1;i<(MaxFrame+1);i++){
		if(i==NowFrame)
			document.getElementById('div'+NowFrame).style.display ='block';   
		else
			document.getElementById('div'+i).style.display ='none';    
	}
    if(NowFrame == MaxFrame)   
		NowFrame = 1;
	else
		NowFrame++;
	theTimer=setTimeout('show()', 4000);  
}