function openZoomBox() {
	document.getElementById("nero").style.display = "block";
	document.getElementById("zoomBoxCnt").style.display = "block";

	if(document.addEventListener) {
		document.addEventListener('keydown', onKey, false);
	} else {
		document.attachEvent('onkeydown', onKey);
	}
}

function closeZoomBox() {
	document.getElementById("nero").style.display = "none";
	document.getElementById("zoomBoxCnt").style.display = "none";

	if(document.removeEventListener) {
		document.removeEventListener('keydown', onKey, false);
	} else {
		document.detachEvent('onkeydown', onKey);
	}
}

function initZoomBox() {

	initCurrent();
	
	openZoomBox();
}

function initCurrent() {
	
}

function onKey(event){
	switch (event.keyCode){
		case 27: closeZoomBox();
	}
}