var arr_days=new Array();

arr_days[1]=31;
arr_days[2]=28;
arr_days[3]=31;
arr_days[4]=30;
arr_days[5]=31;
arr_days[6]=30;
arr_days[7]=31;
arr_days[8]=31;
arr_days[9]=30;
arr_days[10]=30;
arr_days[11]=30;
arr_days[12]=31;

var arr_month_lang=new Array();
var arr_month=new Array();

arr_month_lang[1]='Enero';
arr_month_lang[2]='Febrero';
arr_month_lang[3]='Marzo';
arr_month_lang[4]='Abril';
arr_month_lang[5]='Mayo';
arr_month_lang[6]='Junio';
arr_month_lang[7]='Julio';
arr_month_lang[8]='Agosto';
arr_month_lang[9]='Septiembre';
arr_month_lang[10]='Octubre';
arr_month_lang[11]='Noviembre';
arr_month_lang[12]='Diciembre';

arr_month[1]='01';
arr_month[2]='02';
arr_month[3]='03';
arr_month[4]='04';
arr_month[5]='05';
arr_month[6]='06';
arr_month[7]='07';
arr_month[8]='08';
arr_month[9]='09';
arr_month[10]='10';
arr_month[11]='11';
arr_month[12]='12';

var set_calendar='';

day_change=0;
month_change=0;
year_change=0;

function show_calendar(formdate, day, month, year)
{

	//alert(month);

	var x=0;

	document.getElementById("b_calendar").style.display='block';

	if(formdate=="from")
	{
		document.getElementById("b_calendar").style.top="100px";
	}
	else
	{

		document.getElementById("b_calendar").style.top="124px";

	}

	//length_rows=document.getElementById("table_calendar").rows.length;
	//El año
	//calendar_rows[0].cells.innerHTML='pepe';

	today=new Date();

	month_now=today.getMonth()+1;
	year_now=today.getFullYear();

	//today.setFullYear(year,(month-1),day);
	today.setFullYear(year,(month-1),1);
	/*year=today.getFullYear();*/

	day_week=today.getDay()-1;
	
	if(day_week==-1)
	{

		day_week=6;

	}

	if( isleap( today.getFullYear() ) == true )
	{

		arr_days[2]=29;
	
	}

	//alert(day_week);
	document.getElementById('year_calendar').innerHTML=year;

	calendar_rows=document.getElementById("table_calendar").rows;
	length_rows=calendar_rows.length;

	//alert(length_rows-2);
	//Creamos el calendario del mes y año en el que estamos...

	z=1;	
	
	month_days=arr_days[month];
	//alert(day_week+'<'+month_days);
	//alert(month_days);

	//Limpiamos los fila primera y la fila ultima

	var my_first_row=calendar_rows[3].cells;

	for(y=0;y<7;y++)
	{

		my_first_row[y].innerHTML='';
		

	}

	/*var my_last_row=calendar_rows[8].cells;

	for(y=0;y<7;y++)
	{

		my_last_row[y].innerHTML='';
		

	}*/

	for(x=2;x<length_rows;x++)
	{

		var my_row=calendar_rows[x].cells;

		var num_cells=calendar_rows[x].cells.length;

		for(y=0;y<num_cells;y++)
		{

			my_row[y].innerHTML='';

		}

	}

	for(x=2;x<length_rows;x++)
	{
		var my_row=calendar_rows[x].cells;

		var num_cells=calendar_rows[x].cells.length;

		for(y=day_week;y<num_cells;y++)
		{

			if(z<=month_days)
			{

				my_row[y].innerHTML='<a href="" onclick="set_day(\''+formdate+'\', '+z+', '+month+', '+year+'); return false;">'+z+'</a>';

			}
			z++;
	
		}

		day_week=0;

	}

	set_calendar=formdate;

	//Ponemos el nombre de este mes y el año...

	document.getElementById('month_calendar').innerHTML=arr_month_lang[month];

	//Seteamos la variable actual

	day_change=day;
	month_change=month;
	year_change=year;
	
	if(month>month_now)
	{

		document.getElementById('goback_month').style.display='';

	}
	else
	if(month<=month_now && year>year_now)
	{

		document.getElementById('goback_month').style.display='';

	}
	else
	{

		document.getElementById('goback_month').style.display='none';

	}

	return false;

}

function hidden_calendar(formdate)
{

	document.getElementById("b_calendar").style.display='none';

	//set_calendar='';

	return false;

}

function set_day(input, day, month, year)
{

	//alert(day+'/'+month+'/'+year);
	
	if(input=='from')
	{
		document.forms.formSearch.day.value=day;
		document.forms.formSearch.month.value=month;
		document.forms.formSearch.yearFrom.value=year;
		document.getElementById("monthAndYearFrom").innerHTML=day+'/'+arr_month[month]+'/'+year;

	}
	else
	if(input=='until')
	{
		//alert(document.forms.formSearch.day_last.value);
		document.forms.formSearch.day_last.value=day;
		document.forms.formSearch.month_last.value=month;
		document.forms.formSearch.yearUntil.value=year;
		document.getElementById("monthAndYearUntil").innerHTML=day+'/'+arr_month[month]+'/'+year;

	}
	
	document.forms.formSearch.change_day.value=1;
	
	hidden_calendar(input);

}

function forward_month()
{

	day=day_change;//document.forms.formSearch.day.value;
	
	month=parseInt(month_change)+1;
	
	if(month==13)
	{

		month=1;

	}
	
	if(month==1)
	{	//document.forms.formSearch.yearFrom.value
		year=parseInt(year_change)+1;
	}
	else
	{

		year=year_change;
		//document.forms.formSearch.yearFrom.value;

	}

	//hidden_calendar(set_calendar);
	show_calendar(set_calendar, day, month, year);

	document.getElementById('goback_month').style.display='';

	return false;

}

function goback_month()
{

	day=day_change;//document.forms.formSearch.day.value;
	
	month=parseInt(month_change)-1;
	
	if(month==0)
	{

		month=12;

	}
	
	if(month==12)
	{	//document.forms.formSearch.yearFrom.value
		year=parseInt(year_change)-1;
	}
	else
	{

		year=year_change;
		//document.forms.formSearch.yearFrom.value;

	}

	//hidden_calendar(set_calendar);
	show_calendar(set_calendar, day, month, year);

	//document.getElementById('goback_month').style.display='';

	return false;

}

function isleap(yr)
{

	if ((parseInt(yr)%4) == 0)
	{
		if (parseInt(yr)%100 == 0)
		{
                	if (parseInt(yr)%400 != 0)
			{
                    
                    		return false;

                	}
			if (parseInt(yr)%400 == 0)
			{
				return true;
			}

		}
		
		if (parseInt(yr)%100 != 0)
		{
			return true;
		}

        }

        if ((parseInt(yr)%4) != 0)
	{

		return false;

        }
}