// 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 show_calendar(str_target, str_datetime) {
	var xCalendario = 560;
	var yCalendario = 138;
//	alert(document.fm_horario.dt_viagem);
	var arr_months = ["Janeiro", "Fevereiro", "Março", "Abril", "Maio", "Junho",
		"Julho", "Agosto", "Setembro", "Outubro", "Novembro", "Dezembro"];
	var week_days = ["Dom", "Seg", "Ter", "Qua", "Qui", "Sex", "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);
	
	// html generation (feel free to tune it for your particular application)
	// print calendar header
//	var str_visibility = calendario.style.visibility;
	var str_buffer = new String (
		"<div id='calendario' style='position:absolute; VISIBILITY: hidden;z-index=228;left:"+xCalendario+";top:"+yCalendario+"'>" +
		"<center>\n"+
		"<table class=\"clsOTable\" cellspacing=\"0\" border=\"0\">\n"+
		"<tr><td bgcolor=\"#4682B4\" width=\"10\">\n"+
		"<table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" width=\"100%\">\n"+
		"<tr>\n	<td bgcolor=\"#4682B4\"><a href=\"javascript:change_calendar('"+
		str_target+"', '"+ dt2dtstr(dt_prev_month)+"'+document.cal.time.value);\">"+
		"<img src=\"imagens/bt_cal_prev.gif\" border=\"0\""+
		" alt=\"Mês anterior\"></a></td>\n"+
		"	<td bgcolor=\"#4682B4\" colspan=\"5\">"+
		"<font color=\"white\" face=\"Arial, Helvetica, sans-serif\" size=\"1\">"
		+arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear()+"</font></td>\n"+
		"	<td bgcolor=\"#4682B4\" align=\"right\"><a href=\"javascript:change_calendar('"
		+str_target+"', '"+dt2dtstr(dt_next_month)+"'+document.cal.time.value);\">"+
		"<img src=\"imagens/bt_cal_next.gif\" border=\"0\""+
		" alt=\"Próximo mês\"></a></td>\n</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 bgcolor=\"#87CEFA\">"+
		"<font color=\"white\" face=\"Arial, Helvetica, sans-serif\" size=\"1\">"+
		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++) {
				if (dt_current_day.getDate() == dt_datetime.getDate() &&
					dt_current_day.getMonth() == dt_datetime.getMonth())
					// print current date
					str_buffer += "	<td bgcolor=\"#FFB6C1\" align=\"right\">";
				else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6)
					// weekend days
					str_buffer += "	<td bgcolor=\"#DBEAF5\" align=\"right\">";
				else
					// print working days of current month
					str_buffer += "	<td bgcolor=\"white\" align=\"right\">";

				if (dt_current_day.getMonth() == dt_datetime.getMonth())
					// print days of current month
//					str_buffer += "<a href=\"javascript:"+str_target+
//					".value='"+dt2dtstr(dt_current_day)+"'+document.cal.time.value; closecalendar();\">"+
//					"<font color=\"black\" face=\"Arial, Helvetica, sans-serif\" size=\"1\">";
					str_buffer += "<a href=\"javascript:"+str_target+
					".value='"+dt2brstr(dt_current_day)+"'; closecalendar();\">"+
					"<font color=\"black\" face=\"Arial, Helvetica, sans-serif\" size=\"1\">";
				else 
					// print days of other months
					str_buffer += "<a href=\"javascript:"+str_target+
					".value='"+dt2brstr(dt_current_day)+"';closecalendar();\">"+
					"<font color=\"gray\" face=\"Arial, Helvetica, sans-serif\" size=\"1\">";
				str_buffer += dt_current_day.getDate()+"</font></a></td>\n";
				dt_current_day.setDate(dt_current_day.getDate()+1);
		}
		// print row footer
		str_buffer += "</tr>\n";
	}
	// print calendar footer
	str_buffer +=
		"<form name=\"cal\">\n<tr><td colspan=\"7\" bgcolor=\"#87CEFA\">"+
		"<font color=\"White\" face=\"Arial, Helvetica, sans-serif\" size=\"1\">"+
		"Hora: <input class=\"text\" type=\"text\" name=\"time\" value=\""+dt2tmstr(dt_datetime)+
		"\" size=\"8\" maxlength=\"8\"></font></td></tr>\n</form>\n" +
		"</table>\n" +
		"</tr>\n</td>\n</table>\n" +
		"</center>\n" +
		"</div>\n";

	if (calendario.style.visibility=="visible")
	{
		closecalendar();
	}
	else {
		calendario.outerHTML=str_buffer;
		calendario.style.visibility="visible";
	}

	//	var vWinCal = window.open("", "Calendar", 
	//	"width=200,height=250,status=no,resizable=yes,top=200,left=200");

	//	vWinCal.opener = self;

	//var calc_doc = vWinCal.document;
	//calc_doc.write (str_buffer);
	//calc_doc.close();

}
// datetime parsing and formatting routimes. modify them if you wish other datetime format
function str2dt (str_datetime) {
	var re_date = /^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/;
	if (!re_date.exec(str_datetime)) {
		dt_datetime = new Date();
		str_datetime = dt2dtstr (dt_datetime) + ' ' + dt2tmstr (dt_datetime);
//		alert(str_datetime);
	}
	if (!re_date.exec(str_datetime))
		return alert("Formato da Data Inválida: "+ 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()));
}

function dt2brstr (dt_datetime) {
	str_dia	= String (dt_datetime.getDate());
	str_mes = String (dt_datetime.getMonth()+1);
	str_ano  = String (dt_datetime.getFullYear());
	if (str_dia.length==1) str_dia = '0' + str_dia;
	if (str_mes.length==1) str_mes = '0' + str_mes;
	str_date = new String (str_dia+"/"+str_mes+"/"+str_ano);
//	str_date = new String (dt_datetime.getDate()+"/"+(dt_datetime.getMonth()+1)+"/"+dt_datetime.getFullYear()+" ")
	return str_date;
}

function change_calendar(str_target, str_datetime) {
	calendario.style.visibility="hidden";
	show_calendar(str_target, str_datetime);
}

function closecalendar(){
	calendario.style.visibility="hidden";
}

function FormataData(formulario,campo,teclapres) {
	var tecla = teclapres.keyCode;
//	alert(tecla);
	vr = document.forms[formulario][campo].value;
	vr = vr.replace( ".", "" );
	vr = vr.replace( "/", "" );
	vr = vr.replace( "/", "" );
	tam = vr.length + 1;

	if ( tecla != 9 && tecla != 8 && tecla != 46 ) {
		if ( tam > 2 && tam < 5 )
			document.forms[formulario][campo].value = vr.substr( 0, tam - 2  ) + '/' + vr.substr( tam - 2, tam );
		if ( tam >= 5 && tam <= 10 )
			document.forms[formulario][campo].value = vr.substr( 0, 2 ) + '/' + vr.substr( 2, 2 ) + '/' + vr.substr( 4, 4 ); 
	}
}