if (typeof(COMMON_JS) == 'undefined') { // 한번만 실행
	var COMMON_JS = true;

	// 전역 변수
	var errmsg = "";
	var errfld;

	// 필드 검사
	function check_field(fld, msg)
	{
		if ((fld.value = trim(fld.value)) == "")
			error_field(fld, msg);
		else
			clear_field(fld);
		return;
	}

	// 필드 오류 표시
	function error_field(fld, msg)
	{
		if (msg != "")
			errmsg += msg + "\n";
		if (!errfld) errfld = fld;
		fld.style.background = "#BDDEF7";
	}

	// 필드를 깨끗하게
	function clear_field(fld)
	{
		fld.style.background = "#FFFFFF";
	}

	function trim(s)
	{
		var t = "";
		var from_pos = to_pos = 0;

		for (i=0; i<s.length; i++)
		{
			if (s.charAt(i) == ' ')
				continue;
			else
			{
				from_pos = i;
				break;
			}
		}

		for (i=s.length; i>=0; i--)
		{
			if (s.charAt(i-1) == ' ')
				continue;
			else
			{
				to_pos = i;
				break;
			}
		}

		t = s.substring(from_pos, to_pos);
		//				alert(from_pos + ',' + to_pos + ',' + t+'.');
		return t;
	}

	// 자바스크립트로 PHP의 number_format 흉내를 냄
	// 숫자에 , 를 출력
	function number_format(data)
	{

		var tmp = '';
		var number = '';
		var cutlen = 3;
		var comma = ',';
		var i;

		len = data.length;
		mod = (len % cutlen);
		k = cutlen - mod;
		for (i=0; i<data.length; i++)
		{
			number = number + data.charAt(i);

			if (i < data.length - 1)
			{
				k++;
				if ((k % cutlen) == 0)
				{
					number = number + comma;
					k = 0;
				}
			}
		}

		return number;
	}

	// 새 창
	function popup_window(url, winname, opt)
	{
		var popup = window.open(url, winname, opt);
	}


	// 폼메일 창
	function popup_formmail(url)
	{
		opt = 'scrollbars=yes,width=417,height=385,top=10,left=20';
		popup_window(url, "wformmail", opt);
	}

	// , 를 없앤다.
	function no_comma(data){
		var tmp = '';
		var comma = ',';
		var i;

		for (i=0; i<data.length; i++)
		{
			if (data.charAt(i) != comma)
				tmp += data.charAt(i);
		}
		return tmp;
	}

	// 삭제 검사 확인
	function del(href) {
		if(confirm("한번 삭제한 자료는 복구할 방법이 없습니다.\n\n정말 삭제하시겠습니까?"))
			document.location.href = href;
	}

	// 쿠키 입력
	function set_cookie(name, value, expirehours, domain) {
		var today = new Date();
		today.setTime(today.getTime() + (60*60*1000*expirehours));
		document.cookie = name + "=" + escape( value ) + "; path=/; expires=" + today.toGMTString() + ";";
		if (domain) {
			document.cookie += "domain=" + domain + ";";
		}
	}

	// 쿠키 얻음
	function get_cookie(name) {
		var find_sw = false;
		var start, end;
		var i = 0;

		for (i=0; i<= document.cookie.length; i++) {
			start = i;
			end = start + name.length;

			if(document.cookie.substring(start, end) == name) {
				find_sw = true
				break
			}
		}

		if (find_sw == true) {
			start = end + 1;
			end = document.cookie.indexOf(";", start);

			if(end < start)
				end = document.cookie.length;

			return unescape(document.cookie.substring(start, end));
		}
		return "";
	}

	// 쿠키 지움
	function delete_cookie(name)
	{
		var today = new Date();

		today.setTime(today.getTime() - 1);
		var value = get_cookie(name);
		if(value != "")
			document.cookie = name + "=" + value + "; path=/; expires=" + today.toGMTString();
	}

	// 이미지의 크기에 따라 새창의 크기가 변경됩니다.
	// zzzz님께서 알려주셨습니다. 2005/04/12
	function image_window(img)
	{
		var w = img.tmp_width;
		var h = img.tmp_height;
		var winl = (screen.width-w)/2;
		var wint = (screen.height-h)/3;

		if (w >= screen.width) {
			winl = 0;
			h = (parseInt)(w * (h / w));
		}

		if (h >= screen.height) {
			wint = 0;
			w = (parseInt)(h * (w / h));
		}

		var js_url = "<script language='JavaScript1.2'> \n";
			js_url += "<!-- \n";
			js_url += "var ie=document.all; \n";
			js_url += "var nn6=document.getElementById&&!document.all; \n";
			js_url += "var isdrag=false; \n";
			js_url += "var x,y; \n";
			js_url += "var dobj; \n";
			js_url += "function movemouse(e) \n";
			js_url += "{ \n";
			js_url += "  if (isdrag) \n";
			js_url += "  { \n";
			js_url += "    dobj.style.left = nn6 ? tx + e.clientX - x : tx + event.clientX - x; \n";
			js_url += "    dobj.style.top  = nn6 ? ty + e.clientY - y : ty + event.clientY - y; \n";
			js_url += "    return false; \n";
			js_url += "  } \n";
			js_url += "} \n";
			js_url += "function selectmouse(e) \n";
			js_url += "{ \n";
			js_url += "  var fobj      = nn6 ? e.target : event.srcElement; \n";
			js_url += "  var topelement = nn6 ? 'HTML' : 'BODY'; \n";
			js_url += "  while (fobj.tagName != topelement && fobj.className != 'dragme') \n";
			js_url += "  { \n";
			js_url += "    fobj = nn6 ? fobj.parentNode : fobj.parentElement; \n";
			js_url += "  } \n";
			js_url += "  if (fobj.className=='dragme') \n";
			js_url += "  { \n";
			js_url += "    isdrag = true; \n";
			js_url += "    dobj = fobj; \n";
			js_url += "    tx = parseInt(dobj.style.left+0); \n";
			js_url += "    ty = parseInt(dobj.style.top+0); \n";
			js_url += "    x = nn6 ? e.clientX : event.clientX; \n";
			js_url += "    y = nn6 ? e.clientY : event.clientY; \n";
			js_url += "    document.onmousemove=movemouse; \n";
			js_url += "    return false; \n";
			js_url += "  } \n";
			js_url += "} \n";
			js_url += "document.onmousedown=selectmouse; \n";
			js_url += "document.onmouseup=new Function('isdrag=false'); \n";
			js_url += "//--> \n";
			js_url += "</"+"script> \n";

		var settings;

		if (g4_is_gecko) {
			settings  ='width='+(w+10)+',';
			settings +='height='+(h+10)+',';
		} else {
			settings  ='width='+w+',';
			settings +='height='+h+',';
		}
		settings +='top='+wint+',';
		settings +='left='+winl+',';
		settings +='scrollbars=no,';
		settings +='resizable=yes,';
		settings +='status=no';


		win=window.open("","image_window",settings);
		win.document.open();
		win.document.write ("<html><head> \n<meta http-equiv='imagetoolbar' CONTENT='no'> \n<meta http-equiv='content-type' content='text/html; charset="+g4_charset+"'>\n");
		var size = "이미지 사이즈 : "+w+" x "+h;
		win.document.write ("<title>"+size+"</title> \n");
		if(w >= screen.width || h >= screen.height) {
			win.document.write (js_url);
			var click = "ondblclick='window.close();' style='cursor:move' title=' "+size+" \n\n 이미지 사이즈가 화면보다 큽니다. \n 왼쪽 버튼을 클릭한 후 마우스를 움직여서 보세요. \n\n 더블 클릭하면 닫혀요. '";
		}
		else
			var click = "onclick='window.close();' style='cursor:pointer' title=' "+size+" \n\n 클릭하면 닫혀요. '";
		win.document.write ("<style>.dragme{position:relative;}</style> \n");
		win.document.write ("</head> \n\n");
		win.document.write ("<body leftmargin=0 topmargin=0 bgcolor=#dddddd style='cursor:arrow;'> \n");
		win.document.write ("<table width=100% height=100% cellpadding=0 cellspacing=0><tr><td align=center valign=middle><img src='"+img.src+"' width='"+w+"' height='"+h+"' border=0 class='dragme' "+click+"></td></tr></table>");
		win.document.write ("</body></html>");
		win.document.close();

		if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
	}

	// a 태그에서 onclick 이벤트를 사용하지 않기 위해
	function win_open(url, name, option)
	{
		popup = window.open(url, name, option);
		popup.focus();
	}

	// 우편번호 창
	function win_zip(frm_name, frm_zip1, frm_zip2, frm_addr1, frm_addr2)
	{
		url = g4_path + "/" + g4_bbs + "/zip.php?frm_name="+frm_name+"&frm_zip1="+frm_zip1+"&frm_zip2="+frm_zip2+"&frm_addr1="+frm_addr1+"&frm_addr2="+frm_addr2;
		win_open(url, "winZip", "left=50,top=50,width=616,height=460,scrollbars=1");
	}

	// 쪽지 창
	function win_memo(url)
	{
		if (!url)
			url = g4_path + "/" + g4_bbs + "/memo_form.php";
		win_open(url, "winMemo", "left=50,top=50,width=616,height=460,scrollbars=1");
	}

	// 포인트 창
	function win_point(url)
	{
		win_open(g4_path + "/" + g4_bbs + "/point.php", "winPoint", "left=20, top=20, width=616, height=635, scrollbars=1");
	}

	// 스크랩 창
	function win_scrap(url)
	{
		if (!url)
			url = g4_path + "/" + g4_bbs + "/scrap.php";
		win_open(url, "scrap", "left=20, top=20, width=616, height=500, scrollbars=1");
	}

	// 패스워드 분실 창
	function win_password_forget()
	{
		win_open(g4_path + "/" + g4_bbs + "/password_forget.php", 'winPasswordForget', 'left=50, top=50, width=616, height=500, scrollbars=1');
	}

	// 코멘트 창
	function win_comment(url)
	{
		win_open(url, "winComment", "left=50, top=50, width=800, height=600, scrollbars=1");
	}

	// 폼메일 창
	function win_formmail(mb_id, name, email)
	{
		win_open(g4_path+"/" + g4_bbs + "/formmail.php?mb_id="+mb_id+"&name="+name+"&email="+email, "winFormmail", "left=50, top=50, width=600, height=480, scrollbars=0");
	}

	// 달력 창
	function win_calendar(fld, cur_date, delimiter, opt)
	{
				alert("a");

		if (!opt)
			opt = "left=50, top=50, width=240, height=230, scrollbars=0,status=0,resizable=0";
		win_open(g4_path+"/" + g4_bbs + "/calendar.php?fld="+fld+"&cur_date="+cur_date+"&delimiter="+delimiter, "winCalendar", opt);
	}

	// 설문조사 창
	function win_poll(url)
	{
		if (!url)
			url = "";
		win_open(url, "winPoll", "left=50, top=50, width=616, height=500, scrollbars=1");
	}

	// 자기소개 창
	function win_profile(mb_id)
	{
		win_open(g4_path+"/" + g4_bbs + "/profile.php?mb_id="+mb_id, 'winProfile', 'left=50,top=50,width=616,height=500,scrollbars=1');
	}

	var last_id = null;
	function menu(id)
	{
		if (id != last_id)
		{
			if (last_id != null)
				document.getElementById(last_id).style.display = "none";
			document.getElementById(id).style.display = "block";
			last_id = id;
		}
		else
		{
			document.getElementById(id).style.display = "none";
			last_id = null;
		}
	}

	function textarea_decrease(id, row)
	{
		if (document.getElementById(id).rows - row > 0)
			document.getElementById(id).rows -= row;
	}

	function textarea_original(id, row)
	{
		document.getElementById(id).rows = row;
	}

	function textarea_increase(id, row)
	{
		document.getElementById(id).rows += row;
	}

	// 글숫자 검사
	function check_byte(content, target)
	{
		var i = 0;
		var cnt = 0;
		var ch = '';
		var cont = document.getElementById(content).value;

		for (i=0; i<cont.length; i++) {
			ch = cont.charAt(i);
			if (escape(ch).length > 4) {
				cnt += 2;
			} else {
				cnt += 1;
			}
		}
		// 숫자를 출력
		document.getElementById(target).innerHTML = cnt;

		return cnt;
	}

	// 브라우저에서 오브젝트의 왼쪽 좌표
	function get_left_pos(obj)
	{
		var parentObj = null;
		var clientObj = obj;
		//var left = obj.offsetLeft + document.body.clientLeft;
		var left = obj.offsetLeft;

		while((parentObj=clientObj.offsetParent) != null)
		{
			left = left + parentObj.offsetLeft;
			clientObj = parentObj;
		}

		return left;
	}

	// 브라우저에서 오브젝트의 상단 좌표
	function get_top_pos(obj)
	{
		var parentObj = null;
		var clientObj = obj;
		//var top = obj.offsetTop + document.body.clientTop;
		var top = obj.offsetTop;

		while((parentObj=clientObj.offsetParent) != null)
		{
			top = top + parentObj.offsetTop;
			clientObj = parentObj;
		}

		return top;
	}

	function flash_movie(src, ids, width, height, wmode) {
		var wh = "";
		if (parseInt(width) && parseInt(height))
			wh = " width='"+width+"' height='"+height+"' ";
		return "<object classid='clsid:d27cdb6e-ae6d-11cf-96b8-444553540000' codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0' "+wh+" id="+ids+"><param name=wmode value="+wmode+"><param name=movie value="+src+"><param name=quality value=high><embed src="+src+" quality=high wmode="+wmode+" type='application/x-shockwave-flash' pluginspage='http://www.macromedia.com/shockwave/download/index.cgi?p1_prod_version=shockwaveflash' "+wh+"></embed></object>";
	}

	function obj_movie(src, ids, width, height, autostart) {
		var wh = "";
		if (parseInt(width) && parseInt(height))
			wh = " width='"+width+"' height='"+height+"' ";
		if (!autostart) autostart = false;
		return "<embed src='"+src+"' "+wh+" autostart='"+autostart+"'></embed>";
	}

	function doc_write(cont) {
		document.write(cont);
	}

}