// banner 위젯에서 사용하는 함수
var bannerStartKey = 1;
var bannerNowPositon = 1;
function toggleBanner(opt){
	fnb=window.clearInterval(fnb);
	fnb=window.setInterval("toggleBanner('next')", 7000);
    if(opt == 'pre'){
        if(bannerNowPositon == 1){
            var nowObj = eval("document.getElementById('banner_" + bannerNowPositon + "')");
            var preObj = eval("document.getElementById('banner_" + bannerEndKey + "')");
            nowObj.style.display = 'none';
            preObj.style.display = 'block';
            bannerNowPositon = bannerEndKey;
        }else{
            var nowObj = eval("document.getElementById('banner_" + bannerNowPositon + "')");
            var preObj = eval("document.getElementById('banner_" + (bannerNowPositon - 1) + "')");
            nowObj.style.display = 'none';
            preObj.style.display = 'block';
            bannerNowPositon--;
        }
    }else{
        if(bannerNowPositon == bannerEndKey){
            var nowObj = eval("document.getElementById('banner_" + bannerEndKey + "')");
            var nextObj = eval("document.getElementById('banner_" + bannerStartKey + "')");
            nowObj.style.display = 'none';
            nextObj.style.display = 'block';
            bannerNowPositon = bannerStartKey;
        }else{
            var nowObj = eval("document.getElementById('banner_" + bannerNowPositon + "')");
            var nextObj = eval("document.getElementById('banner_" + (bannerNowPositon + 1) + "')");
            nowObj.style.display = 'none';
            nextObj.style.display = 'block';
            bannerNowPositon++;
        }
    }
}