var n		= 0;
var bgimg	= new Array(
    "/images/main/star_bg_ditto002.jpg", 
    "/images/main/star_bg_ditto003.jpg", 
    "/images/main/star_bg_ditto004.jpg", 
    "/images/main/star_bg_ditto005.jpg", 
    "/images/main/star_bg_ditto006.jpg", 
    "/images/main/star_bg_ditto007.jpg",
    "/images/main/star_bg_ditto001.jpg" 
);

var preLoad = new Array();
for (i = 0; i < bgimg.length; i++) {
	preLoad[i] = new Image();
	preLoad[i] = bgimg[i];
}

function change_background() {
	var bgObj	= document.body;
	
	bgObj.style.filter			= 'blendTrans(duration=2)';
	bgObj.style.filter			= 'blendTrans(duration=CrossFadeDuration)';
	bgObj.filters.blendTrans.apply();
	bgObj.style.backgroundImage = 'url('+preLoad[n]+')';
	bgObj.filters[0].Duration	= 0.5; // 숫자가 클수록 스무스 효과가 길어집니다.
	bgObj.style.visibility		= 'visible';
	bgObj.filters.blendTrans.play();
	if(n+1 == bgimg.length) {
		n = 0;
	} else {
		n = n+1;
	}
}