//GNB
function gnbover( idx ) {
	if(idx) {
		var obj;
		for (var z=1; z<5; z++){
			obj = document.getElementById('gnb' + z);
			if (z == idx){
				obj.className= "on";
			} else {
				obj.className = "";
			}
		}
	}
	return;
}
function gnbout() {
	
		var obj;
		for (var z=1; z<5; z++){
			obj = document.getElementById('gnb' + z);
			obj.className = "";
		}
	
	return;
}
function gnbMenu(a,b) {
	for (var i=1 ; i <= a ; i++ ){
		var obj_gnb = document.getElementById("gnb" + a);
		if(i == a) {
			obj_gnb.className = "on";
			if (b) {
				for ( var j=1; j<=b ; j++ ){
				var obj_gnbs = document.getElementById("gnb" + a + b);
				if(j == b) {
					if(obj_gnbs.className.indexOf("first") != -1){
						obj_gnbs.className = "first on";
					}else{
						obj_gnbs.className = "on";
					}
				}
				}
			}
		}
	}
}
function go_page(url) {
    if(url != "") window.open(url, "", "");
}