var range_first = 0;

function selectType(type){
clearSelect();
switch (type){
case "range":
document.getElementById('div_range').style.display='block';
document.getElementById('div_single').style.display='none';
alert("Seleziona il primo giorno da inserire");
break;


case "single":
document.getElementById('div_range').style.display='none';
document.getElementById('div_single').style.display='block';
break;

default:
  alert("Seleziona una tipologia");
}

}



function calendarDateSelect(type,data,data_inv){
  
var fullday = new Date();
switch (type){
case "range":
  if(range_first==0){
    clearSelect();
    
    fullday.setFullYear(parseInt(data.substring(0,4),10), parseInt(data.substring(5,7),10)-1, parseInt(data.substring(8,10),10));
    	  if(document.getElementById("day_"+fullday.getDay()).checked){
	    appendOptionLast(data,data_inv);
	  }
    range_first=data_inv;
    alert("Seleziona l'ultimo giorno da inserire");
  }else{
	  
      for(i=(parseInt(range_first.substring(0,2),10)+1);i<=parseInt(data_inv.substring(0,2),10);i++){
	  fullday.setFullYear(parseInt(data.substring(0,4),10), parseInt(data.substring(5,7),10)-1, i);
	    if(document.getElementById("day_"+fullday.getDay()).checked){
	      appendOptionLast(data.substring(0,8)+((i < 10 ? '0' : '') + i),((i < 10 ? '0' : '') + i)+data_inv.substring(2,10));
	    }
      }
      
      
    range_first=0;
  }
break;


case "single":
appendOptionLast(data,data_inv); 
break;
}

}



function removeOptionSelected()
{
  var elSel = document.getElementById('calendar_days');
  var i;
  for (i = elSel.length - 1; i>=0; i--) {
    if (elSel.options[i].selected) {
      elSel.remove(i);
    }
  }
}



function appendOptionLast(valore,testo)
{
  var elOptNew = document.createElement('option');
  elOptNew.text = testo;
  elOptNew.value = valore;
  var elSel = document.getElementById('calendar_days');

  try {
    elSel.add(elOptNew, null); // standards compliant; doesn't work in IE
  }
  catch(ex) {
    elSel.add(elOptNew); // IE only
  }
  
}



function selectAll()
{
var selectObj = document.getElementById('calendar_days');

for(i=0;i<=selectObj.length-1;i++){ 
selectObj.options[i].selected = true;
}
}



function checkDays(){
for(i=0;i<=6;i++){ 
document.getElementById("day_"+i).checked=true;
}
}



function clearSelect(){

var selectObj = document.getElementById('calendar_days');

var selectParentNode = selectObj.parentNode;
var newSelectObj = selectObj.cloneNode(false); // Make a shallow copy
selectParentNode.replaceChild(newSelectObj, selectObj);
return newSelectObj;

}