// 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, ask_heure) {

	var arr_months = ["Janvier", "Fevrier", "Mars", "Avril", "Mai", "Juin",
		"Juillet", "Août", "Septembre", "Octobre", "Novembre", "Decembre"];
	var week_days = ["Di", "Lu", "Ma", "Me", "Je", "Ve", "Sa"];
	var n_weekstart = 1; // day week starts from (normally 0 or 1)

	var space_index = str_datetime.indexOf(" ");
	if (space_index!=-1){
          str_datetime = str_datetime.substr(0, space_index);
        }

	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_buffer = new String (
		"<html>\n"+
		"<head>\n"+
		"	<title>Calendar</title>\n"+
		"<script language=\"javascript\">"+
		"function valide (date){\n"+
		"var hour='';\n");
	if (ask_heure==1){
		str_buffer = str_buffer+"hour=prompt('Indiquez l\\\'heure associée à cette date (hh:mm)\\n(Laissez le champ vide si pas d\\\'heure...)');\n";
	}	
 	str_buffer = str_buffer+"if (hour==null){hour='';}"+ 
		"if (hour.indexOf(':')>0){\n"+
 		"window.opener."+str_target+".value=date+' '+hour;\n"+
      		"}else{\n"+
 		"window.opener."+str_target+".value=date;\n"+
     		"}\n"+					
        	"window.close();\n"+		
		"}</script>\n"+
		"<script language=\"javascript\">"+
		"function valide2 (frm){\n"+

		"window.opener.show_calendar('"+str_target+"', '"+dt_datetime.getDay()+"/'+(parseInt(frm.mois.options[frm.mois.selectedIndex].value))+'/'+frm.annee.options[frm.annee.selectedIndex].value);\n"+	       	
		"}</script>\n"+
		"</head>\n"+
		"<body bgcolor=\"White\">\n"+
		"<form name=\"ts_pick\">"+
		"<table class=\"clsOTable\" cellspacing=\"0\" border=\"0\" width=\"100%\">\n"+
		"<tr><td bgcolor=\"#C14B50\">\n"+
		"<table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" width=\"100%\">\n"+
		"<tr>\n	<td bgcolor=\"#C14B50\"><a href=\"javascript:window.opener.show_calendar('"+
		str_target+"', '"+ dt2dtstr(dt_prev_month)+"');\">"+
		"<img src=\"http://www.vacances.com/img/prev.gif\" width=\"15\" height=\"15\" border=\"0\""+
		" alt=\"previous month\"></a></td>\n"+
		"	<td bgcolor=\"#C14B50\" colspan=\"5\" align=\"center\">"+
		"<font color=\"white\" face=\"tahoma, verdana\" size=\"2\"><b>"+
		"<select name=\"mois\" style=\"font-size: 9px;\" onchange=\"valide2(this.form); return false;\">";

		for(i=0; i<12; i++){
			if (i==dt_datetime.getMonth()){
				mois_selected=" selected";
			}else{
				mois_selected="";
			}
                  str_buffer+="<option "+mois_selected+" value=\""+(i+1)+"\">"+arr_months[i]+"</option>";
                }
		str_buffer+="</select>";
		str_buffer+="<select name=\"annee\" style=\"font-size: 9px;\" onchange=\"valide2(this.form); return false;\">";	
		i=dt_datetime.getFullYear()-5;
		var max = dt_datetime.getFullYear()+15;
		for(i=i; i<=max; i++){
			if (i==dt_datetime.getFullYear()){
				annee_selected=" selected";
			}else{
				annee_selected="";
			}
                  str_buffer+="<option "+annee_selected+" value=\""+i+"\">"+i+"</option>";
                }
		str_buffer+="</select>";
		//+arr_months[dt_datetime.getMonth()]+" "+dt_datetime.getFullYear();

		str_buffer+="</font></b></td>\n"+
		"	<td bgcolor=\"#C14B50\" align=\"right\"><a href=\"javascript:window.opener.show_calendar('"
		+str_target+"', '"+dt2dtstr(dt_next_month)+"');\">"+
		"<img src=\"http://www.vacances.com/img/next.gif\" width=\"15\" height=\"15\" border=\"0\""+
		" alt=\"next month\"></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=\"#E9A4A7\" align=\"center\">"+
		"<font color=\"white\" face=\"Arial, verdana\" size=\"2\"><b>"+
		week_days[(n_weekstart+n)%7]+"</font></b></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=\"#E9A4A7\" align=\"center\">";
				else if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6)
					// weekend days
					str_buffer += "	<td bgcolor=\"#FEE9BF\" align=\"center\">";
				else
					// print working days of current month
					str_buffer += "	<td bgcolor=\"#FFFAEA\" align=\"center\">";

				if (dt_current_day.getMonth() == dt_datetime.getMonth())
					// print days of current month
					str_buffer += "<a href=\"#\" onClick=\"valide('"+dt2dtstr(dt_current_day)+"');\">"+
					"<font color=\"#C14B50\" face=\"Arial, verdana\" size=\"2\"><b>";
				else 
					// print days of other months
					str_buffer += "<a href=\"#\" onClick=\"valide('"+dt2dtstr(dt_current_day)+"');\">"+
					"<font color=\"gray\" face=\"Arial, verdana\" size=\"2\"><b>";
				str_buffer += dt_current_day.getDate()+"</font></b></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>"+
		"</body>\n" +
		"</html>\n";


	var vWinCal = window.open("", "Calendar", 
		"width=200,height=260,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$/;
	var re_date = /^(\d+)\/(\d+)\/(\d+)$/;


	//if (!re_date.exec(str_datetime))
	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) {

	var jour, mois;
	jour=dt_datetime.getDate()+'';
	mois=(dt_datetime.getMonth()+1)+'';

	if (jour.length==1){
		jour='0'+jour;
	}

	if (mois.length==1){
		mois='0'+mois;
	}

	return (new String (
			jour+"/"+mois+"/"+dt_datetime.getFullYear()));
}
function dt2tmstr (dt_datetime) {
	return (new String (
			" "+dt_datetime.getHours()+":"+dt_datetime.getMinutes()+":"+dt_datetime.getSeconds()));
}

