// Title: Timestamp picker
// Description: See the demo at url
// URL: http://us.geocities.com/tspicker/
// Script featured on: http://javascriptkit.com/script/script2/timestamp.shtml
// Version: 1.0
// Date: 12-05-2001 (mm-dd-yyyy)
// Author: Denis Gritcyuk <denis@softcomplex.com>; <tspicker@yahoo.com>
// Notes: Permission given to use this script in any kind of applications if
//    header lines are left unchanged. Feel free to contact the author
//    for feature requests and/or donations

function setDataCalendario(chi, dati)
{
	document.getElementById(chi).value = dati;
	
	divCalID = document.getElementById("divCalendar");
	divCalID.innerHTML = "";
	divCalID.style.background = "none";
	divCalID.style.height = "0px";
	
	document.getElementById(chi).style.background = "#ffffff";
	
}

function close_calendar()
{
	divCalID = document.getElementById("divCalendar");
	divCalID.innerHTML = "";
	divCalID.style.background = "none";
	divCalID.style.height = "0px";	
	
	document.getElementById("daData").style.background = "#ffffff";
	document.getElementById("aData").style.background = "#ffffff";
	
	calendarOpen = 0;
}

function valPredefinito(val1, val2)
{
	if (document.form1.daData.value=="gg-mm-aaaa") { val2="" }
	if (document.form1.aData.value=="gg-mm-aaaa") { val2="" }
	
	if (calendarOpen==1) { close_calendar() }
	
	calendarOpen = 1;
	show_calendar(val1, val2);
}

function show_calendar(str_target, str_datetime) {
	var arr_months = ["Gennaio", "Febbraio", "Marzo", "Aprile", "Maggio", "Giugno",
		"Luglio", "Agosto", "Settembre", "Ottobre", "Novembre", "Dicembre"];
	var week_days = ["Dom", "Lun", "Mar", "Mer", "Gio", "Ven", "Sab"];
	var n_weekstart = 1; // day week starts from (normally 0 or 1)

	var dt_datetime = (str_datetime == null || str_datetime =="" ?  new Date() : str2dt(str_datetime));
	var dt_prev_month = new Date(dt_datetime);
	dt_prev_month.setMonth(dt_datetime.getMonth()-1);
	var dt_next_month = new Date(dt_datetime);
	dt_next_month.setMonth(dt_datetime.getMonth()+1);
	var dt_firstday = new Date(dt_datetime);
	dt_firstday.setDate(1);
	dt_firstday.setDate(1-(7+dt_firstday.getDay()-n_weekstart)%7);
	var dt_lastday = new Date(dt_next_month);
	dt_lastday.setDate(0);
	
	var txtRif = "";
	if (str_target=="daData") { txtRif = "<font color=\"#ffffff\">&nbsp;&nbsp;dal</font>" }
	if (str_target=="aData") { txtRif = "<font color=\"#ffffff\">&nbsp;&nbsp;al</font>" }
	
	// html generation (feel free to tune it for your particular application)
	// print calendar header
	var str_buffer = new String (
		
		"<table id='tlbCalendar' border='0' width='238' align='center' cellspacing='0' cellpadding='0'>\n"+
		"<tr><td colspan='7' style='height: 20px'>\n"+
			"<table width='100%' border='0' cellspacing='0' cellpadding='0'>\n"+
			"<tr>\n"+
			"<td width='10%'>"+txtRif+"</td>\n"+
			"<td width='80%' align='center'>\n"+
			"<a class=\"calendarLink\" href=\"javascript:void(0)\" onClick=\"show_calendar('"+str_target+"', '"+ dt2dtstr(dt_prev_month)+"');\">&lt;&lt;</a>&nbsp;&nbsp;<font color=\"#ffffff\">"+arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+"</font>&nbsp;&nbsp;<a class=\"calendarLink\" href=\"javascript:void(0)\" onClick=\"show_calendar('"
		+str_target+"', '"+dt2dtstr(dt_next_month)+"');\"> &gt;&gt;</a>\n"+
			"</td>\n"+
			"<td width='10%' align='center'><a href=\"javascript:void(0)\" onClick=\"close_calendar();\"><img src='img/chiudical.gif' border='0' alt='Chiudi Calendario' title='Chiudi Calendario'></a></td>\n"+
			"</tr>\n"+
			"</table>\n"+
		"</td></tr>\n"
	);

	var dt_current_day = new Date(dt_firstday);
	// print weekdays titles
	str_buffer += "<tr>\n";
	for (var n=0; n<7; n++)
		str_buffer += "	<td class='tdCalGio' style='text-align: right'>"+
		"<font color=\"#696969\">"+week_days[(n_weekstart+n)%7]+"</font></td>\n";
	// print calendar table
	str_buffer += "</tr>\n";
	while (dt_current_day.getMonth() == dt_datetime.getMonth() ||
		dt_current_day.getMonth() == dt_firstday.getMonth()) {
		// print row heder
		str_buffer += "<tr>\n";
		for (var n_current_wday=0; n_current_wday<7; n_current_wday++) {
				classDay = "dateLinkNormal"
				if (dt_current_day.getDate() == dt_datetime.getDate() && dt_current_day.getMonth() == dt_datetime.getMonth()) 		
					{
					// print current date
					str_buffer += "	<td class='tdCalGio'>"; 
					classDay = "dateLinkCurrent"
					}
				else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6) 
					{
					// weekend days
					str_buffer += "	<td class='tdCalGio'>"; 
					}
				else 
					{
					// print working days of current month
					str_buffer += "	<td class='tdCalGio'>"; 
					}

				if (dt_current_day.getMonth()!= dt_datetime.getMonth()) 
					{
					// print days of current month					
					classDay = "dateLinkOther"
					}
					
				str_buffer += "<a class=\""+classDay+"\" href=\"javascript:void(0)\" onClick=\"setDataCalendario('"+str_target+"', '"+dt2dtstr(dt_current_day)+"')\">"; 
				str_buffer += dt_current_day.getDate()+"</a></td>\n";
				dt_current_day.setDate(dt_current_day.getDate()+1);
		}
		// print row footer
		str_buffer += "</tr>\n";
	}
	// print calendar footer
	str_buffer +=
		"</table>\n"
	
	var vWinCal = document.getElementById("divCalendar");	
	vWinCal.innerHTML = str_buffer;
	vWinCal.style.height = "126px";	
	vWinCal.style.visibility = "visible";
	vWinCal.style.background = "url(img/sfTabCalendario.gif) no-repeat";
	
	
	document.getElementById(str_target).style.background = "#F5F5FF";
	
}
// datetime parsing and formatting routimes. modify them if you wish other datetime format
function str2dt (str_datetime) {
	var re_date = /^(\d+)\-(\d+)\-(\d+)\s$/;
	
	if (!re_date.exec(str_datetime))
		return alert("Invalid Datetime format: "+ str_datetime);
	return (new Date (RegExp.$3, RegExp.$2-1, RegExp.$1, RegExp.$4, RegExp.$5, RegExp.$6));
}
function dt2dtstr (dt_datetime) {
	return (new String (
			dt_datetime.getDate()+"-"+(dt_datetime.getMonth()+1)+"-"+dt_datetime.getFullYear()+" "));		
			
}
function dt2tmstr (dt_datetime) {
	return (new String (
			dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}