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

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

		//폰트확대
		function FontPlus(){
			var l = $('ContentsLayer');
			var nSize = l.style.fontSize ? l.style.fontSize : '12px';
			var iSize = parseInt(nSize.replace('px',''));

			if(iSize < 24){
				l.style.fontSize  = (iSize + 1) + 'px';
				l.style.lineHeight = '140%';
			}
		}
		//폰트축소
		function FontMinus(){
			var l = document.getElementById('ContentsLayer');
			var nSize = l.style.fontSize ? l.style.fontSize : '12px';
			var iSize = parseInt(nSize.replace('px',''));

			if(iSize > 11){
				l.style.fontSize = (iSize - 1) + 'px';
				l.style.lineHeight = '140%';
			}
		}

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

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

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

				today.setTime(today.getTime() - 1);
				var value = getCookie(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)
		{
				var 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.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)
		{
				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);
		}
}