function setNum(){
	var photoObj = returnOBJ('img_1');
	photoObj.num = photoNum;
	first = true;
	slideShow();
}

function slideShow(){
	if(banerImg.length > 1){
		if(first){
			slideTimer = setTimeout('setNextPhoto()', 1000);
			first = false;
		}
		else{
			slideTimer = setTimeout('setNextPhoto()', 5000);
		}
		photoLoaded = false;
		var photoObj = returnOBJ('img_2');
		photoObj.innerHTML = "<img src=\""+banerImg[photoNum]+"\" onload=\"setBg(this.parentNode)\">";
	}
}

function setBg(obj){
	photoLoaded = true;
	obj.style.backgroundImage = "url("+banerImg[photoNum]+")";
	obj.innerHTML = null;
}

nowAlpha = 100;
function setNextPhoto(){
	if(photoLoaded){
		clearTimeout(slideTimer);
		var photoObj = returnOBJ('img_2');
		nowAlpha = 100;
		slideTimer = setInterval('alphaGain()', 10);
		var bg = returnOBJ('bannerBg');
		bg.style.visibility = "hidden";
	}
	else{
		slideTimer = setTimeout('setNextPhoto()', 1);
	}
}

function alphaGain(){
	var photoObj = returnOBJ('img_1');
	nowAlpha += (0 - nowAlpha)*.3;
	ch_alpha(photoObj,nowAlpha);
	if(nowAlpha < 1){
		clearInterval(slideTimer);
		var photoNameObj = returnOBJ('imgName');
		photoNameObj.innerHTML = banerName[photoNum];
		photoObj.style.backgroundImage = "url("+banerImg[photoNum]+")";
		photoObj.num = photoNum;
		nowAlpha = 100
		ch_alpha(photoObj,nowAlpha);
		photoNum++;
		if(photoNum == banerImg.length) photoNum = 0;
		slideShow();
		var bg = returnOBJ('bannerBg');
		bg.style.visibility = "visible";
	}
}