// cal.js

// Output Element
var ds_oe = ds_getel('ds_calclass');
// Container
var ds_ce = ds_getel('ds_conclass');

// Output Buffering
var ds_ob = ''; 

//initial date
var ds_i_date;
var ds_c_month;
var ds_c_year;

var ds_element; // Text Element...
var ds_element2; // Text Element 2... EX. start and end date 
var ds_offset=0; // Days to add to 2nd date

var ds_date_format='yyyy-MM-dd';//MySQL default 


var ds_monthnames = [
'January', 'February', 'March', 'April', 'May', 'June',
'July', 'August', 'September', 'October', 'November', 'December'
]; // You can translate it for your language.

var ds_daynames = [
'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'
]; // You can translate it for your language.



// Get Element By Id
function ds_getel(id) {
      return document.getElementById(id);
}

// 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.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="0" class="ds_tbl">'
            + '<tr>'
              + '<td colspan="7" valign="top" class="ds_headSM" style="font-size:9px;" ><img src="http://www.group-res.com/images/groupres/calendar/close.gif" onclick="ds_hi();" style="cursor: pointer;"/></td>'
             + '</tr>'
           + '<tr>'
             + '<td class="ds_head" style="cursor: pointer" onclick="ds_py();" ><img src="http://www.group-res.com/images/groupres/calendar/arrowLL.gif" /></td>'
             + '<td class="ds_head" style="cursor: pointer" onclick="ds_pm();"><img src="http://www.group-res.com/images/groupres/calendar/arrowL.gif" /></td>'
             + '<td colspan="3" class="ds_head">' + t + '</td>'
             + '<td class="ds_head" style="cursor: pointer" onclick="ds_nm();"><img src="http://www.group-res.com/images/groupres/calendar/arrowR.gif" /></td>'
             + '<td class="ds_head" style="cursor: pointer" onclick="ds_ny();"><img src="http://www.group-res.com/images/groupres/calendar/arrowRR.gif" /></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) {
      //date in the past, disable the onclick (change the format?)
      if(past(d,m,y)){
            return '<td class="ds_cell_past">' + d + '</td>';
      }
      //the currently selected date, highlighted
      if(d==ds_i_date.getDate()&&((m*1)-1)==ds_i_date.getMonth()&&y==ds_i_date.getFullYear()){ 
            return '<td class="ds_cell_selected" onclick="ds_onclick(' + d + ',' + m + ',' + y + ')">' + d + '</td>';
      }
      //regular date 
      else{
            return '<td class="ds_cell" onclick="ds_onclick(' + d + ',' + m + ',' + y + ')">' + d + '</td>';// Define width the day row.
      }
}

function ds_template_main_below() {
      var today=new Date();
      var d=today.getDate();
      var m=(today.getMonth()+1);
      var y=today.getFullYear();
      return '</tr>'
      		+'<tr>'
      			+'<td colspan="7" valign="top" class="ds_ftr" onclick="ds_onclick(' + d + ',' + m + ',' + y + ')"><span class="ds_ftrTxt">Select Today: '+ds_format_date(d, m, y)+'</span></td>'
      		+'</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.setDate(1);
      ds_dc_date.setMonth(m - 1);
      ds_dc_date.setFullYear(y);
      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();

}



// 2 dates are connected, change the 2nd to match 1st
function ds_sh2(t,id){
	ds_element2=ds_getel(id);
	ds_sh(t);
}
function ds_sh2Image(id1,id2){
	ds_sh(ds_getel(id),id2);
}

// 2 dates are connected, change the 2nd to be 1st plus numdays
function ds_sh2offset(t,id,d){
	ds_element2=ds_getel(id);
	ds_offset=d;
	ds_sh(t);
}
function ds_sh2offsetImage(id1,id2,d){
	ds_sh2offset(ds_getel(id1),id2,d);
}

// Click a calendar image to get the cal.
function ds_shImage(id){
	ds_sh(ds_getel(id));
}
// A function to show the calendar.
// When user click on the date, it will set the content of t.
function ds_sh(t) {
      // Set the element to set...
      ds_element = t;
      
      //Get the Date and set the current month and year.
      if(ds_i_date!=null){
      	   //use ds_i_date
      }
      else if(t.value!=""){
      	ds_i_date = ds_makeDate(t.value);
      }
      else if(document.getElementById('mstart')){
      	ds_i_date = ds_makeDate(document.getElementById('mstart').innerHTML);
      }
      else{
      	ds_i_date=new Date();
      }
      
      
      
      ds_c_month = ds_i_date.getMonth() + 1;
      ds_c_year = ds_i_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.style.display = '';

      // Move the calendar container!
      the_left = ds_getleft(t);
      the_top = ds_gettop(t) + t.offsetHeight;

      ds_ce.style.left = the_left + 'px';
      ds_ce.style.top = the_top + 'px';

      // Scroll it into view.
      //ds_ce.scrollIntoView();
}

 

// Hide the calendar.

function ds_hi() {
      ds_ce.style.display = 'none';
}

 

// Moves to the next month...

function ds_nm() {
      // 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...
function ds_pm() {
      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...
function ds_ny() {
      // Increase the current year.
      ds_c_year++;
      // Redraw the calendar.
      ds_draw_calendar(ds_c_month, ds_c_year);
}

 

// Moves to the previous year...
function ds_py() {
      // 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);
}
 

function ds_format_date(d, m, y) {
    var mDig=(ds_date_format.lastIndexOf('M')-ds_date_format.indexOf('M'))+1;
    var dDig=(ds_date_format.lastIndexOf('d')-ds_date_format.indexOf('d'))+1;
    var yDig=(ds_date_format.lastIndexOf('y')-ds_date_format.indexOf('y'))+1;
    
    var m2 = '00' + m;
    m2 = m2.substr(m2.length - mDig);
    var d2 = '00' + d;
    d2 = d2.substr(d2.length - dDig);
    var y2=''+y;
    y2=y2.substr(y2.length - yDig);

	var s=getSeperator();
	var o=getOrder();
	var returndate='';

	for(var i=0; i<o.length; i++){
		var ch=o.substring(i,i+1);
		if(ch=='y'){
			returndate+=(s+y2);	
		}
		else if(ch=='M'){
			returndate+=(s+m2);	
		}
		else{
			returndate+=(s+d2);	
		}
	}
	var r2=returndate.substring(returndate.length-ds_date_format.length);
	return returndate.substring(returndate.length-ds_date_format.length);

}

function ds_format_dateObject(date) {
	return ds_format_date(date.getDate(), date.getMonth() + 1, date.getFullYear());
}
 

// When the user clicks the day.

function ds_onclick(d, m, y) {
	  // Hide the calendar.
      ds_hi();
      // Set our global date, so calendar is the same next time we come to it
      ds_i_date.setFullYear(y,((m*1)-1),d);
      
      // Set the value of it, if we can.
      if (typeof(ds_element.value) != 'undefined') {
            ds_element.value = ds_format_date(d, m, y);
      // Maybe we want to set the HTML in it.
      } else if (typeof(ds_element.innerHTML) != 'undefined') {
            ds_element.innerHTML = ds_format_date(d, m, y);
      // I don't know how should we display it, just alert it to user.
      } else {
            alert (ds_format_date(d, m, y));
      }
      
      if(ds_element2!=null){
      	var el2date=new Date();
		el2date.setTime(ds_i_date.getTime()+(ds_offset*86400000));
		var el2formated=ds_format_dateObject(el2date);
		
      	if (typeof(ds_element2.value) != 'undefined') {
      		ds_element2.value = el2formated;
	    // Maybe we want to set the HTML in it.
		} else if (typeof(ds_element2.innerHTML) != 'undefined') {
	    	ds_element2.innerHTML = el2formated;
	    // I don't know how should we display it, just alert it to user.
	    } else {
	    	alert (el2formated);
	    }
	    ds_element2=null;
      	ds_offset=0;
      }
      
}

function ds_makeDate(d){
      //MM/dd/YYYY
      var m1=ds_date_format.indexOf('M');
      var m2=ds_date_format.lastIndexOf('M')+1;
      var d1=ds_date_format.indexOf('d');
      var d2=ds_date_format.lastIndexOf('d')+1;
      var y1=ds_date_format.indexOf('y');
      var y2=ds_date_format.lastIndexOf('y')+1;
      
      var month=d.substring(m1,m2);
      var day=d.substring(d1,d2);
      var year=d.substring(y1,y2);
      var year2 = '20' + year;
   	  year2 = year2.substr(year2.length - 4);
      
      var ped=new Date();
      ped.setFullYear(year2,((month*1)-1),day);
      return ped;

}

function setDateFormat(f){
	ds_date_format=f;
}

function past(d,m,y){
      var today = new Date();
      var pd=new Date();
      pd.setFullYear(y,((m*1)-1),d);
      return ((pd<today) ? true : false);
}
function getSeperator(){
	for(var i=0; i<ds_date_format.length; i++){
		var ch=ds_date_format.substring(i,i+1);
		if(ch!='y'&&ch!='M'&&ch!='D'){
			return ch;
		}
	}
}
function getOrder(){
	var m=ds_date_format.indexOf('M');
	var d=ds_date_format.indexOf('d');
	var y=ds_date_format.indexOf('y');
	
	if(y<m && y<d){
		if(m<d){
			return 'yMd';
		}
		else {
			return 'ydM';
		}
	}
	else if(m<y && m<d){
		if(y<d){
			return 'Myd';
		}
		else {
			return 'Mdy';
		}
	}
	else {
		if(m<y){
			return 'dMy';
		}
		else {
			return 'dyM';
		}
	}
	
}

/***********************
	 Time selector
***********************/


var tm_time;
var tm_hour;
var tm_min;
var tm_ampm;
var tm_element;


function tm_draw_display(){
	 // First clean the output buffer.
      ds_ob_clean();
      
      // Here we go, do the header
      ds_echo (tm_display());
      
      // And let's display..
      ds_ob_flush();
      
      // Scroll it into view.
      //ds_ce.scrollIntoView();

}

function tm_sh(t){
	 // Set the element to set...
      tm_element = t;
      
      //Get the Date and set the current month and year.
      if(tm_time!=null){
      	   //use tm_time
      }
      else if(t.value!=""){
      	tm_time = tm_makeTime(t.value);
      }
      else{
      	tm_time=new Date();
      }
      
      tm_hour = tm_time.getHours();
      tm_min = tm_time.getMinutes();
      tm_ampm = (tm_hour > 11)? 'PM' : 'AM';
      
      alert(tm_hour+""+tm_min+tm_ampm);
     
      tm_element.value=(tm_hour-12)+":"+tm_min+" "+tm_ampm;

/*
      // Draw the calendar
      ds_draw_calendar(ds_c_month, ds_c_year);

      // To change the position properly, we must show it first.
      ds_ce.style.display = '';

      // Move the calendar container!
      the_left = ds_getleft(t);
      the_top = ds_gettop(t) + t.offsetHeight;

      ds_ce.style.left = the_left + 'px';
      ds_ce.style.top = the_top + 'px';
*/
      // Scroll it into view.
      //ds_ce.scrollIntoView();
}



function tm_display(){
	
}

function tm_makeTime(t){
	alert(t);
	//hh:mm a
	var col=t.indexOf(":");
	var h=t.substring(0,col);
    var m=t.substring(col+1,5);
    var a= ((t.indexOf("A")==-1)? 12 :0)
    var tmp=new Date();
	tmp.setHours(h+a-1);
	tmp.setMinutes(m);
	alert(tmp);
    return tmp;
}

function tm_onclick(d, m, y) {
	  // Hide the calendar.
      ds_hi();
      // Set our global date, so calendar is the same next time we come to it
      ds_i_date.setFullYear(y,((m*1)-1),d);
      
      // Set the value of it, if we can.
      if (typeof(ds_element.value) != 'undefined') {
            ds_element.value = ds_format_date(d, m, y);
      // Maybe we want to set the HTML in it.
      } else if (typeof(ds_element.innerHTML) != 'undefined') {
            ds_element.innerHTML = ds_format_date(d, m, y);
      // I don't know how should we display it, just alert it to user.
      } else {
            alert (ds_format_date(d, m, y));
      }
      
      if(ds_element2!=null){
      	
      	if (typeof(ds_element2.value) != 'undefined') {
      		ds_element2.value = ds_format_date((d+ds_offset), m, y);
	    // Maybe we want to set the HTML in it.
		} else if (typeof(ds_element2.innerHTML) != 'undefined') {
	    	ds_element2.innerHTML = ds_format_date((d+ds_offset), m, y);
	    // I don't know how should we display it, just alert it to user.
	    } else {
	    	alert (ds_format_date((d+ds_offset), m, y));
	    }
      }
      ds_element2=null;
      ds_offset=0;
}