var num = 0;	
	var timeInterval = 2000;
	setTimeout('change_img();',timeInterval);
	function change_img(){
	var imgSize = document.getElementById("imgsSize").value;
		if(num > (imgSize - 1)){
			num = 0;
		}
		setTimeout('setFocus('+ num +');',timeInterval);
		num++;
		setTimeout('change_img();',timeInterval);
	}

	function setFocus(id){
		selectImg(id);
	}
	
	function selectImg(id){	
		var imgSize = document.getElementById("imgsSize").value;
		var imgs = new Array();
		var imgnavs = new Array();		
		for(var i = 0; i < imgSize ; i++){
			imgs[i] = document.getElementById("focus" +(i + 1));
			imgnavs[i] = document.getElementById("focusnav" + (i + 1))
		}
		for(var i = 0 ; i < imgs.length ; i++){		
			if(i == id){
				imgs[i].style.display = "block";
				imgs[i].style.filter = "FlipH";
				imgnavs[i].style.color = "red";
				imgnavs[i].className = "active1";
			}else{
				imgs[i].style.display = "none";
				imgnavs[i].style.color = "black";
				imgnavs[i].className = "active";
			}		
		}		
	}