var num=4;
	var n=0;
	function Mea(value){
		n=value;
		navigator.userAgent.indexOf("Firefox")>0?playfirfox(value):	plays(value);		
	}

			k=true
	function plays(value){
		var iad=GetObj('dvimgad');
	
		with (iad){
			if(k==true)
			{
				className="imgad1";
				k=false;
			}
			else
			{
				className="imgad2";
				k=true;
			}
			iad.filters[0].Apply();
			for(i=0;i<num;i++)i==value?children[i].style.display="block":children[i].style.display="none"; 
				filters[0].play(); 	
			}
	}
	function playfirfox(i)
	{
		for(j=0;j<num;j++)
		{
			GetObj("imad"+j).style.display="none";
		}
		GetObj("imad"+i).style.display="";
	}
	function clearAuto(){ clearInterval(autoStart)}
	function setAuto(){autoStart=setInterval("auto(n)", 5000)}
	function auto(){
		n++;
		if(n>num-1)
		{
			n=0;
		}

		Mea(n);	
	} 
	function GetObj(s)
	{
		return document.getElementById(s);
		}