// JavaScript Document
function catcalc(cal) {
        var date = cal.date;
        var time = date.getTime();
        // use the _other_ field
        var field = document.getElementById("f_calcdate");
        if (field == cal.params.inputField) {
            field = document.getElementById("f_date_a");
            time -= Date.DAY; // substract one day
        } else {
            time += Date.DAY; // add one day
        }
        var date2 = new Date(time);
        field.value = date2.print("%Y-%m-%d");
		var giorno1 = document.getElementById('select_giorno1').value;
		var mese1 = document.getElementById('select_mese1').value;
		var anno1 = document.getElementById('select_anno1').value;
		var giorno2 = document.getElementById('f_calcdate').value.substring(8,10);
		document.getElementById('select_giorno2').value = giorno2;
		var mese2 = document.getElementById('f_calcdate').value.substring(5,7); 
		document.getElementById('select_mese2').value = mese2;
		var anno2 = document.getElementById('f_calcdate').value.substring(0,4); 
		document.getElementById('select_anno2').value = anno2;
		//controlli per il giorno al
		controlli_cambioTendine2();
    }
	var data_oggetto = new Date();
	var primoanno = data_oggetto.getFullYear();
    Calendar.setup({
		button		   :	"btn1_cal",
        inputField     :    "f_date_a",   // id of the input field
        ifFormat       :    "%Y-%m-%d",   // format of the input field
        showsTime      :    false,
        onUpdate       :    catcalc,
		weekNumbers:false,
		firstDay:1,
		range		   :	[primoanno,(primoanno+2)]
    });
    Calendar.setup({
		button		   :	"btn2_cal",
        inputField     :    "f_calcdate",
        ifFormat       :    "%Y-%m-%d",
        showsTime      :    false,
        onUpdate       :    catcalc,
		weekNumbers:false,
		firstDay:1,
		range		   :	[primoanno,(primoanno+2)]
    });

function set_start(){
	var data_start = new Date();
	var giorno_start = data_start.getUTCDate();
	if(giorno_start<10){
		giorno_start = "0" + giorno_start;
	}
	var mese_start = data_start.getMonth()+1;
	if(mese_start<10){
		mese_start = "0" + mese_start;
	}
	var anno_start = data_start.getFullYear();
	
	
	var max_anno = data_start.getFullYear()+1;
	
}
set_start();
controlli_cambioTendine2();