function check_submit() {
	if(!document.getElementById("comment-name").value) {
		alert("이름을 입력하세요");
		document.getElementById("comment-name").focus();
		return false;
	}
	if(!document.getElementById("comment").value) {
		alert("내용을 입력하세요");
		document.getElementById("comment").focus();
		return false;
	}
	document.getElementById("button").style.visibility = "hidden";

	indicator = document.createElement("img");
	indicator.src = "/home/images/indicator.gif";
	indicator.alt = "waiting";
	//indicator.style.position = "absolute";

	document.getElementById("button").parentNode.appendChild(indicator);

	return true;
}

var click = false;
function click_again() {
	if (click) return;

	click = true;
	document.getElementById("comment").value = "";
}