var nowDate    = new Date(); 
var class_uno;

function showCalendar(date,class_uno,class_id,buno,tutor_id,id) { 

    var destDate    = getCalendarStringToDate(date); 
    getCalendarTags(destDate,class_uno,class_id,buno,tutor_id,id); 
} 
function getCalendarStringToDate(strDate) { 

    var di    = new Array("-", ".", ","); 
    var returnDate  = new Date();
    var arrDate; 

    for(var i = 0 ; i < di.length; i++){ 
        arrDate = strDate.split(di[i]); 
        if(arrDate.length ==3){ 
            returnDate.setYear(arrDate[0]); 
            returnDate.setMonth(arrDate[1] - 1); 
            returnDate.setDate(arrDate[2]); 
            break; 
        } 
    } 

    if(!isNaN(strDate) && strDate.length ==8) { 
        returnDate.setYear(strDate.substring(0,4)); 
        returnDate.setMonth(strDate.substring(4,6) -1); 
        returnDate.setDate(strDate.substring(6)); 
    } 

    return returnDate; 
} 
function getCalendarFirstDateOfWeek(tDate) {
	
    var sunDay = new Date(); 
    var firstDateOfMonth    = new Date(); 
    firstDateOfMonth.setYear(tDate.getFullYear()); 
    firstDateOfMonth.setMonth(tDate.getMonth()); 
    firstDateOfMonth.setDate(1); 
    sunDay.setTime(dayPlus(firstDateOfMonth, firstDateOfMonth.getDay() * -1)); 
    return sunDay; 
}  
function dayPlus(tDate,cnt) {    

    var rtnDate    = new Date(); 
    rtnDate.setTime(tDate.getTime() + ( cnt * 24 * 60 * 60 * 1000 ) ); 
    return rtnDate; 
}  
function getCalendarLastDate(tDate) { 

    rtnDate    = getMonthLastDay(tDate) 
    rtnDate    = dayPlus(rtnDate,6 - rtnDate.getDay()) 
    return rtnDate; 
}  
function getMonthLastDay(tDate) { 

    var Mon2 
    var rtnDate    = new Date(); 
    var arrLastDay = new Array(31,29,31,30,31,30,31,31,30,31,30,31); 
    if(tDate.getYear() % 4 ==0) Mon2 = true; 
    else Mon2 =false; 
    arrLastDay[1] = (Mon2) ? 29 : 28; 
    rtnDate.setYear(tDate.getFullYear()); 
    rtnDate.setMonth(tDate.getMonth()); 
    rtnDate.setDate(arrLastDay[tDate.getMonth()]); 
    return rtnDate; 
}  
function getCalendarTags(destDate,class_uno,class_id,buno,tutor_id,id) { 

    var arrLastDay = new Array(31,29,31,30,31,30,31,31,30,31,30,31);
    var strTag = ''; 
    var destYear	= destDate.getFullYear(); 
    var destMonth	= destDate.getMonth() + 1; 
    var destDay		= destDate.getDate(); 

    var startDate	= getCalendarFirstDateOfWeek(destDate); 
    var endDate		= getCalendarLastDate(destDate); 
    
	var preYear	= destYear - 1;
    var preMonth	= destMonth - 1;	
    var nextYear	= destYear + 1;
    var nextMonth	= destMonth + 1;

	if(preMonth <10) {
		preMonth = "0" + preMonth;
	}
	if(nextMonth <10) {
		nextMonth = "0" + nextMonth;
	}
	if(destDay <10) {
		destDay = "0" + destDay;
	}

	var preYear_value = preYear + '-' + destMonth + '-' + destDay;
	if(destMonth == 1) {
		var preMonth_value = preYear + '-12' + '-' + destDay;
	} else {
		var preMonth_value = destYear + '-' + preMonth + '-' + destDay;		
	}
	var nextYear_value = nextYear + '-' + destMonth + '-' + destDay;
	if(destMonth == 12) {
		var nextMonth_value = nextYear + '-1' + '-' + destDay;
	} else {
		var nextMonth_value = destYear + '-' + nextMonth + '-' + destDay;		
	}	
	var pDate		= new Date(); 
    pDate			= startDate; 

	var yStr = String(destYear);
	var yimg1 = yStr.substr(0,1);
	var yimg2 = yStr.substr(1,1);
	var yimg3 = yStr.substr(2,1);
	var yimg4 = yStr.substr(3,1);

	var mStr = String(destMonth);
	if(mStr.length == 1) mStr = '0' + mStr;
	var mimg1 = mStr.substr(0,1);
	var mimg2 = mStr.substr(1,1);

	strTag = "<table width='258' border='0' cellspacing='0' cellpadding='0'>";
	strTag += "<tr>";
	strTag += "    <td align='center' style='padding-bottom:10px;'>";
	strTag += "        <table border='0' cellspacing='0' cellpadding='0'>";
	strTag += "        <tr>";
	strTag += "            <td style='padding-right:15px;'><a href='class_index.php?class_uno=" + class_uno + "&class_id=" + class_id + "&buno=" + buno + "&date=" + preMonth_value + "'\"><img src='/classroom/img/icon_pre.gif' border='0' /></a></td>";
	strTag += "            <td><img src='/classroom/img/cal_year_" + yimg1 + ".gif' border='0' /><img src='/classroom/img/cal_year_" + yimg2 + ".gif' border='0' /><img src='/classroom/img/cal_year_" + yimg3 + ".gif' border='0' /><img src='/classroom/img/cal_year_" + yimg4 + ".gif' border='0' /></td>";
	strTag += "            <td style='padding-right:3px;'><img src='/classroom/img/cal_dot.gif' border='0' /></td>";
	strTag += "            <td><img src='/classroom/img/cal_month_" + mimg1 + ".gif' border='0' /><img src='/classroom/img/cal_month_" + mimg2 + ".gif' border='0' /></td>";
	strTag += "            <td style='padding-left:15px;'><a href='class_index.php?class_uno=" + class_uno + "&class_id=" + class_id + "&buno=" + buno + "&date=" + nextMonth_value + "'\"><img src='/classroom/img/icon_next.gif' border='0' /></a></td>";
	strTag += "        </tr>";
	strTag += "        </table>";
	strTag += "    </td>";
	strTag += "</tr>";
	strTag += "<tr>";
	strTag += "    <td>";
	strTag += "        <table width='100%' border='0' cellspacing='0' cellpadding='0'>";
	strTag += "        <tr>";
	strTag += "            <td height='19' align='center' style='background:url(/classroom/img/week_bg.gif) top left repeat-x;'>";
	strTag += "                <table width='95%' border='0' cellspacing='0' cellpadding='0'>";
	strTag += "                <tr>";
	strTag += "                    <td align='center'>ÀÏ</td>";
	strTag += "                    <td align='center'>¿ù</td>";
	strTag += "                    <td align='center'>È­</td>";
	strTag += "                    <td align='center'>¼ö</td>";
	strTag += "                    <td align='center'>¸ñ</td>";
	strTag += "                    <td align='center'>±Ý</td>";
	strTag += "                    <td align='center'>Åä</td>";
	strTag += "                </tr>";
	strTag += "                </table>";
	strTag += "            </td>";
	strTag += "        </tr>";
	strTag += "        <tr>";
	strTag += "            <td align='center'>";
	strTag += "                <table width='95%' border='0' cellspacing='0' cellpadding='0' class='calenderWrap'>";

	s_num = 1;
    while(pDate <= endDate) { 

		y    = pDate.getFullYear(); 
        m    = pDate.getMonth() + 1; 
        d    = pDate.getDate(); 
        ed    = arrLastDay[nowDate.getMonth()]; 

		if(pDate.getDate() == nowDate.getDate() && pDate.getMonth() == nowDate.getMonth()) {
			var todayclass		= "date";
		} else if(pDate.getDate() == destDate.getDate() && pDate.getMonth() == destDate.getMonth()) {
			var todayclass		= "date";
		} else {
			var todayclass		= "";
		}
		if(s_num < d || s_num > d) {
			date_title = '&nbsp;';
		} else {
			date_title = pDate.getDate();
			s_num ++;
		}
		if(m <10) {
			m = "0" + m;
		}
		if(d <10) {
			d = "0" + d;
		}
		d_value = y + '-' + m + '-' + d;

		switch(pDate.getDay()) {
			case 0: //ÀÏ¿äÀÏÀ̸é
				strTag += "                <tr valign='top'>";
				strTag += "                    <td class='sun' bgcolor='#FFFFFF' onclick=\"location.href='class_index.php?class_uno=" + class_uno + "&class_id=" + class_id + "&buno=" + buno + "&date=" + d_value + "'\" style='cursor:pointer;'>" + date_title + "</td>";
			break;
			case 6: //Åä¿äÀÏÀ̸é
				strTag += "                    <td class='sat' bgcolor='#FFFFFF' onclick=\"location.href='class_index.php?class_uno=" + class_uno + "&class_id=" + class_id + "&buno=" + buno + "&date=" + d_value + "'\" style='cursor:pointer;'><b>" + date_title + "</b></td>";
				strTag += "                </tr>";
				strTag += "                <tr>";
				strTag += "                    <td colspan='7' style='height:5px; background: none;'></td>";
				strTag += "                </tr>";
			break;
			default:
				strTag += "                    <td class='date' bgcolor='#FFFFFF' onclick=\"location.href='class_index.php?class_uno=" + class_uno + "&class_id=" + class_id + "&buno=" + buno + "&date=" + d_value + "'\" style='cursor:pointer;'><b>" + date_title + "</b></td>";
			break;
		}    
        pDate    = dayPlus(pDate, 1); //ÇÏ·ç ´õÇÑ´Ù 
    } 

	strTag += "                </table>";
	strTag += "            </td>";
	strTag += "        </tr>";
	strTag += "        </table>";
	strTag += "    </td>";
	strTag += "</tr>";
	strTag += "</table>";

    document.write(strTag);  
}