function setBg(target,id){
	if(document.getElementById(target) == null){
		mytarget = target;
	}else{
		mytarget = 	document.getElementById(target);
	}
	
	for(var i=1;i<11;i++){
		document.getElementById("m_img"+i).childNodes[0].src = "images/menu_" + i + ".jpg";
	}
	document.getElementById("menu_bg").style.backgroundPosition = Number(mytarget.offsetLeft+mytarget.offsetWidth/2-49)+"px 3px";
	mytarget.childNodes[0].src = "images/menu_" + id + "_over.jpg";
	hideAllSub();
	if(id != 1 && id != 10){
		if(id != 9){
			document.getElementById("sub_menuTxt"+id).style.display = "";
		}else{
			document.getElementById("sub_menuTxt"+id).style.display = "";
		}
	}
}
function setHdm(target1,target2,target3,target4){
	document.getElementById(target1).style.backgroundImage = "url(images/main_hdm_select.jpg)";
	document.getElementById(target2).style.backgroundImage = "url(images/main_hdm_unselect.jpg)";
	document.getElementById(target3).style.display = "";
	document.getElementById(target4).style.display = "none";
}
function hideAllSub() {
	for(var j=2;j<10;j++){
		document.getElementById("sub_menuTxt"+j).style.display = "none";
	}
}
function setShow(id,maxid,name){
	for(var i=1;i<=maxid;i++){
		document.getElementById(String(name)+i).style.display = "none";	
	}	
	document.getElementById(String(name)+id).style.display = "";	
}

function setShowTitle(tgt){
	if(document.getElementById(tgt).style.display == ""){
		document.getElementById(tgt).style.display = "none";
	}else{
		document.getElementById(tgt).style.display = "";
	}
}