var refY = 2010; // reference year (must be current year or earlier)

var monthLength = new Array();
monthLength[0]  = 31; // jan
monthLength[1]  = 28; // feb
monthLength[2]  = 31; // mrt
monthLength[3]  = 30; // apr
monthLength[4]  = 31; // mei
monthLength[5]  = 30; // jun
monthLength[6]  = 31; // jul
monthLength[7]  = 31; // aug
monthLength[8]  = 30; // sep
monthLength[9]  = 31; // okt
monthLength[10] = 30; // nov
monthLength[11] = 31; // dec

var resDate = new Array();
resDate[0] = new Array();
resDate[0]['van'] = "2010-06-05";
resDate[0]['tot'] = "2010-06-19";
resDate[1] = new Array();
resDate[1]['van'] = "2010-07-11";
resDate[1]['tot'] = "2010-08-19";
resDate[2] = new Array();
resDate[2]['van'] = "2010-05-29";
resDate[2]['tot'] = "2010-06-02";
resDate[3] = new Array();
resDate[3]['van'] = "2010-08-21";
resDate[3]['tot'] = "2010-09-04";
resDate[4] = new Array();
resDate[4]['van'] = "2010-09-17";
resDate[4]['tot'] = "2010-09-21";
resDate[5] = new Array();
resDate[5]['van'] = "2010-04-01";
resDate[5]['tot'] = "2010-04-04";



function myNRdays(fDate) { // our date reference : 2010-01-01 returns 1 (2010-02-03 returns 34)
	// fDate is a Formatted Date like 2010-04-17

	var i;
	var NRdays = 0;

	var y  = 1*fDate.substr(0,4);
	var m  = 1*fDate.substr(5,2);
	var d  = 1*fDate.substr(8,2);

	var Qy = y - refY;
	for (i=0;i < Qy;i++) {
		NRdays += 365*(refY+i) + (TFschrikkeljaar(refY+i) ? 1 : 0);
	}
	for (i=0;i < m-1;i++) {
		NRdays += monthLength[i];
		NRdays += (TFschrikkeljaar(y) && (i==1)) ? 1 : 0;
	}
	NRdays += d;

	return NRdays;
}

function TFschrikkeljaar(y) {
	return ((y%4)==0);
}

function TFdateReserved(daDate) {

	var i;

	var year = daDate.getYear();
	if (year < 2000) { year += 1900; } // correct when browser assumes we're living in the 1900's
	var monthnumber = 1*daDate.getMonth() + 1;
	var monthday = daDate.getDate();

	var dd,dV,dT;
	var TF = false;
	var Lrd = resDate.length;
	for (i=0;i < Lrd;i++) { // check alle gereserveerde periodes

		dd = myNRdays(myDate(daDate));
		dV = myNRdays(resDate[i]['van']);
		dT = myNRdays(resDate[i]['tot']);
		if (dd >= dV && dd <= dT) {
			TF = true;
			break;
		}
	}
	return TF;
}

function myCurrentDate() {

	var now = new Date();

	var year = now.getYear();
	if (year < 2000) { year += 1900; } // correct when browser assumes we're living in the 1900's

	var monthnumber = 1*now.getMonth() + 1;
	monthday = "01"; // problem : if date is 31 etc. .. so hack it : make date 01, while every month has it ..

	if (monthnumber < 11) {
		monthnumber += 2;
	} else {
		monthnumber -= 10;
		year++;
	}

	return "" + year + "-" + monthnumber + "-" + monthday;
}

function myDate(daDate) {

	var year = daDate.getYear();
	if (year < 2000) { year += 1900; } // correct when browser assumes we're living in the 1900's

	var monthnumber = 1*daDate.getMonth() + 1;
	if (monthnumber < 10) { monthnumber = "0" + monthnumber; }

	var monthday = daDate.getDate();
	if (monthday < 10) { monthday = "0" + monthday; }

	return "" + year + "-" + monthnumber + "-" + monthday;
}

(function($){
	var initLayout = function() {

		$('#RBgetSelection').bind('click', function(){
			alert($('#date3').DatePickerGetDate(true));
			return false;
		});

		$('#clearSelection').bind('click', function(){
			$('#date3').DatePickerClear();
			return false;
		});

		$('#date3').DatePicker({
			flat: true,
			date: ['',''], // bv date: ['2010-03-19','2010-03-26']
			current: myCurrentDate(), // bv '2010-09-01'
			calendars: 4,
			mode: 'range',
			onChange: function(){
				var d2  = "" + $('#date3').DatePickerGetDate(true);
				var d2a = d2.substr(0,10);
				var d2b = d2.substr(11);
				document.getElementById('myDateRange').innerHTML = (d2a==d2b) ? "" : "van "+d2a+" t/m "+d2b;
				document.forms['FMboek'].elements['calRes'].value = (d2a==d2b) ? "" : ""+d2a+d2b;
			},
			onRender: function(date) {
					return {
						disabled: TFdateReserved(date)
					}
				},
			starts: 1
		});

	};

	EYE.register(initLayout, 'init');

})(jQuery)