// image roll : : µÇ´Â°Å(¸ðÁú¶ó¿¡¼­µµ)
function menuOver() {
	this.src = this.src.replace("_on.gif", "_off.gif");
}
function menuOut() {
	this.src = this.src.replace("_off.gif", "_on.gif");
}

function imageOver(imgEl) {
	imgEl.src = imgEl.src.replace("_off.gif", "_on.gif");
}
function imageOut(imgEl) {
	imgEl.src = imgEl.src.replace("_on.gif", "_off.gif");
}

function ShowSubMenu(num) {
	document.getElementById("TopMenu_Sub_"+num).style.display = "block";
}
function HideSubMenu(num) {
	document.getElementById("TopMenu_Sub_"+num).style.display = "none";
}

// image roll/layer show/hide
function ShowTabMenu(num,sum) {
	for(var i=1;i<=sum;i++){   
		var imgTabEl = document.getElementById("tabm"+i);
		if ( i == num ) {
			imgTabEl.src = imgTabEl.src.replace("_off.gif", "_on.gif");
			document.getElementById("TabMenu_Sub_"+i).style.display = "block";
		} else {
			imgTabEl.src = imgTabEl.src.replace("_on.gif", "_off.gif");
			document.getElementById("TabMenu_Sub_"+i).style.display = "none";
		}
	}
}