var DSCalendar = function() {
	
	// Project: Dynamic Date Selector (DtTvB) - 2006-03-16
	// Script featured on JavaScript Kit- http://www.javascriptkit.com
	// Code begin...
	// Set the initial date.
	var ds_i_date = new Date();
	ds_c_month = ds_i_date.getMonth() + 1;
	ds_c_year = ds_i_date.getFullYear();


	// Output Buffering
	var ds_ob = ''; 
	var ds_element; // Text Element...

	var ds_monthnames = [
	'Janvier', 'Février', 'Mars', 'Avril', 'Mai', 'Juin',
	'Juillet', 'Aout', 'Septembre', 'Octobre', 'Novembre', 'Décembre'
	]; // You can translate it for your language.

	var ds_daynames = [
	'Dim', 'Lun', 'Mar', 'Me', 'Jeu', 'Ven', 'Sam'
	]; // You can translate it for your language.

	var ds_oe;
	
	var ds_ce;
	
	// Get the left and the top of the element.
	function ds_getleft(el) {
		var tmp = el.offsetLeft;
		el = el.offsetParent
		while(el) {
			tmp += el.offsetLeft;
			el = el.offsetParent;
		}
		return tmp;
	};
	function ds_gettop (el) {
		var tmp = el.offsetTop;
		el = el.offsetParent
		while(el) {
			tmp += el.offsetTop;
			el = el.offsetParent;
		}
		return tmp;
	};

	function ds_ob_clean () {
		ds_ob = '';
	};
	function ds_ob_flush () {
		ds_oe.dom.innerHTML = ds_ob;
		ds_ob_clean();
	};
	function ds_echo (t) {
		ds_ob += t;
	};


	// Calendar template
	function ds_template_main_above  (t) {
		return '<table cellpadding="3" cellspacing="1" class="ds_tbl">'
		     + '<tr>'
			 + '<td class="ds_head" style="cursor: pointer" onclick="DSCalendar.ds_py();">&lt;&lt;</td>'
			 + '<td class="ds_head" style="cursor: pointer" onclick="DSCalendar.ds_pm();">&lt;</td>'
			 + '<td class="ds_head" style="cursor: pointer" onclick="DSCalendar.ds_hi();" colspan="3">[Fermer]</td>'
			 + '<td class="ds_head" style="cursor: pointer" onclick="DSCalendar.ds_nm();">&gt;</td>'
			 + '<td class="ds_head" style="cursor: pointer" onclick="DSCalendar.ds_ny();">&gt;&gt;</td>'
			 + '</tr>'
		     + '<tr>'
			 + '<td colspan="7" class="ds_head">' + t + '</td>'
			 + '</tr>'
			 + '<tr>';
	};

	function ds_template_day_row (t) {
		return '<td class="ds_subhead">' + t + '</td>';
		// Define width in CSS, XHTML 1.0 Strict doesn't have width property for it.
	};

	function ds_template_new_week () {
		return '</tr><tr>';
	};

	function ds_template_blank_cell  (colspan) {
		return '<td colspan="' + colspan + '"></td>'
	};

	function ds_template_day (d, m, y) {
		return '<td class="ds_cell" onclick="DSCalendar.ds_onclick(' + d + ',' + m + ',' + y + ')">' + d + '</td>';
		// Define width the day row.
	};

	function ds_template_main_below () {
		return '</tr>'
		     + '</table>';
	};

	// This one draws calendar...
	function ds_draw_calendar (m, y) {
		// First clean the output buffer.
		ds_ob_clean();
		// Here we go, do the header
		ds_echo (ds_template_main_above(ds_monthnames[m - 1] + ' ' + y));
		for (i = 0; i < 7; i ++) {
			ds_echo (ds_template_day_row(ds_daynames[i]));
		}
		// Make a date object.
		var ds_dc_date = new Date();
		ds_dc_date.setMonth(m - 1);
		ds_dc_date.setFullYear(y);
		ds_dc_date.setDate(1);
		if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12) {
			days = 31;
		} else if (m == 4 || m == 6 || m == 9 || m == 11) {
			days = 30;
		} else {
			days = (y % 4 == 0) ? 29 : 28;
		}
		var first_day = ds_dc_date.getDay();
		var first_loop = 1;
		// Start the first week
		ds_echo (ds_template_new_week());
		// If sunday is not the first day of the month, make a blank cell...
		if (first_day != 0) {
			ds_echo (ds_template_blank_cell(first_day));
		}
		var j = first_day;
		for (i = 0; i < days; i ++) {
			// Today is sunday, make a new week.
			// If this sunday is the first day of the month,
			// we've made a new row for you already.
			if (j == 0 && !first_loop) {
				// New week!!
				ds_echo (ds_template_new_week());
			}
			// Make a row of that day!
			ds_echo (ds_template_day(i + 1, m, y));
			// This is not first loop anymore...
			first_loop = 0;
			// What is the next day?
			j ++;
			j %= 7;
		}
		// Do the footer
		ds_echo (ds_template_main_below());
		// And let's display..
		ds_ob_flush();
		// Scroll it into view.
		ds_ce.scrollIntoView();
	};
	
		// Format the date to output.
	function ds_format_date (d, m, y) {
		// 2 digits month.
		m2 = '00' + m;
		m2 = m2.substr(m2.length - 2);
		// 2 digits day.
		d2 = '00' + d;
		d2 = d2.substr(d2.length - 2);
		// YYYY-MM-DD
		return d2 + '-' + m2 + '-' + y;
		//return d2 + '-' + m2 + '-' + y;
	};

	return {	

	// A function to show the calendar.
	// When user click on the date, it will set the content of t.
	ds_sh : function (t) {
		// Set the element to set...
		ds_element = t;
		// Make a new date, and set the current month and year.
		var ds_sh_date = new Date();
		ds_c_month = ds_sh_date.getMonth() + 1;
		ds_c_year = ds_sh_date.getFullYear();
		// Draw the calendar
		ds_draw_calendar(ds_c_month, ds_c_year);
		// To change the position properly, we must show it first.
		ds_ce.dom.style.display = '';
		// Move the calendar container!
		the_left = ds_getleft(t);
		the_top = ds_gettop(t) + t.offsetHeight;
		ds_ce.dom.style.left = the_left + 'px';
		ds_ce.dom.style.top = the_top + 'px';
		// Scroll it into view.
		ds_ce.scrollIntoView();
	}

	// Hide the calendar.
	,ds_hi : function () {
		ds_ce.dom.style.display = 'none';
	}

	// Moves to the next month...
	,ds_nm : function () {
		// Increase the current month.
		ds_c_month ++;
		// We have passed December, let's go to the next year.
		// Increase the current year, and set the current month to January.
		if (ds_c_month > 12) {
			ds_c_month = 1; 
			ds_c_year++;
		}
		// Redraw the calendar.
		ds_draw_calendar(ds_c_month, ds_c_year);
	}

	// Moves to the previous month...
	,ds_pm : function () {
		ds_c_month = ds_c_month - 1; // Can't use dash-dash here, it will make the page invalid.
		// We have passed January, let's go back to the previous year.
		// Decrease the current year, and set the current month to December.
		if (ds_c_month < 1) {
			ds_c_month = 12; 
			ds_c_year = ds_c_year - 1; // Can't use dash-dash here, it will make the page invalid.
		}
		// Redraw the calendar.
		ds_draw_calendar(ds_c_month, ds_c_year);
	}

	// Moves to the next year...
	,ds_ny : function () {
		// Increase the current year.
		ds_c_year++;
		// Redraw the calendar.
		ds_draw_calendar(ds_c_month, ds_c_year);
	}

	// Moves to the previous year...
	,ds_py : function () {
		// Decrease the current year.
		ds_c_year = ds_c_year - 1; // Can't use dash-dash here, it will make the page invalid.
		// Redraw the calendar.
		ds_draw_calendar(ds_c_month, ds_c_year);
	}

	// When the user clicks the day.
	,ds_onclick : function (d, m, y) {
		// Hide the calendar.
		DSCalendar.ds_hi();
		// Set the value of it, if we can.
		if (typeof(ds_element.value) != 'undefined') {
			ds_element.value = ds_format_date(d, m, y);
			//ds_element.value = ds_format_date(y, m, d);
		// Maybe we want to set the HTML in it.
		} else if (typeof(ds_element.dom.innerHTML) != 'undefined') {
			//ds_element.innerHTML = ds_format_date(d, m, y);
			ds_element.dom.innerHTML = ds_format_date(y, m, d);
		// I don't know how should we display it, just alert it to user.
		} else {
			alert (ds_format_date(d, m, y));
		//	alert (ds_format_date(y, m, d));
		}
	}
	,init : function() {
		// Output Element
		ds_oe = Ext.get('ds_calclass');
		// Container
		ds_ce = Ext.get('ds_conclass');
	}

	// And here is the end.
}
}();