//TOP½½¶óÀ̵ù ¹è³Ê °ü·Ã ½ºÅ©¸³Æ®
// ¹è³Ê½½¶óÀ̵ù
function slide(Id, interval, to) 
{ 
    var obj = document.getElementById(Id); 
    var H, step = 1000; 

    if (obj == null) return; 
    if (to == undefined) { // user clicking 
        if (obj._slideStart == true) return; 
        if (obj._expand == true) { 
            to = 0; 
            obj.style.overflow = "hidden"; 
        } else { 
            slide.addId(Id); 
            for(var i=0; i < slide.objects.length; i++) { 
                if (slide.objects[i].id != Id && slide.objects[i]._expand == true) { 
                    slide(slide.objects[i].id); 
                } 
            } 

            obj.style.height = ""; 
            obj.style.overflow = ""; 
            obj.style.display = "block"; 
            to = obj.offsetHeight; 
            obj.style.overflow = "hidden"; 
            obj.style.height = "1px"; 
        } 
        obj._slideStart = true; 
    } 
     
    step = ((to > 0) ? 1:-1) * step; 
    interval = ((interval==undefined)?1:interval); 
    obj.style.height = (H=((H=(isNaN(H=parseInt(obj.style.height))?0:H))+step<0)?0:H+step)+"px";
		
    if (H <= 0) { 
        obj.style.display = "none"; 
        obj.style.overflow = "hidden"; 
        obj._expand = false; 
        obj._slideStart = false; 

				// ¿­±â¹öÆ°À¸·Î º¯°æÇϱâ				
				MAIN_TOP_BUTTON.src = "toppic/open.jpg";
				// ´Ý±â ÄíÅ°»ý¼º
				setCookie("topBanner","CLOSE");
		} else if (to > 0 && H >= to) { 
        obj.style.display = "block"; 
        obj.style.overflow = "visible"; 
        obj.style.height = (H-step) + "px"; 
        obj._expand = true; 
        obj._slideStart = false; 

				// ´Ý±â¹öÆ°À¸·Î º¯°æÇϱâ
				MAIN_TOP_BUTTON.src = "toppic/close.jpg";
				// ´Ý±â Äí±â»èÁ¦
				setCookie("topBanner","",-1);
    } else { 
        setTimeout("slide('"+Id+"',"+interval+","+to+");",interval); 
    } 
} 
slide.objects = new Array(); 
slide.addId = function(Id) 
{ 
    for (var i=0; i < slide.objects.length; i++) { 
        if (slide.objects[i].id == Id) return true; 
    } 
    slide.objects[slide.objects.length] = document.getElementById(Id); 
}
// ÄíÅ°¿¡ µû¶ó ½½¶óÀ̵å Á¶Àý
if(getCookie("topBanner") != "CLOSE") {
	window.onload = function() {
			slide('MAIN_TOP_EVENT');
	}
}