function trk_clip() {
	var doc = document.body.createTextRange();
	var obj = document.getElementById("trackback_url");
	doc.moveToElementText(obj);
	doc.select();
	doc.execCommand('copy');
	alert("Æ®·¢¹é ÁÖ¼Ò°¡ Ŭ¸³º¸µå·Î º¹»çµÇ¾ú½À´Ï´Ù.");
}

function spread_box(id) {
	var obj = document.getElementById(id);
	if(obj == null) {
		return;
	}
	obj.style.display = obj.style.display == "none" ? "block" : "none";
}

function delete_trackback(tb_id, id, board) {
	if(tb_id == null) {
		alert("Æ®·¢¹é ID°¡ ¾ø½À´Ï´Ù.");
		return;
	}
	if(confirm("Æ®·¢¹éÀ» »èÁ¦ÇÕ´Ï´Ù.")) {
		location.href = "./delete_trackback.php?board=" + board + "&tb_id=" + tb_id + "&id=" + id;
	}
}