function calculateOffet() {
    //Hide Previous Errors
    document.getElementById("errorTypeguest").style.display="none";
    document.getElementById("errorTyperoom").style.display="none";
	
	/*alert("start");*/
	if (document.getElementById("typeguest1").checked) {
		var typeguest = document.getElementById("typeguest1").value;
	} else if (document.getElementById("typeguest2").checked) {
		var typeguest = document.getElementById("typeguest2").value;
	} else {
		var typeguest = "";
	}

	
	var typeroom = document.getElementById("typeroom").value;
    var nights = document.getElementById("nights").value;
    var rooms = document.getElementById("rooms").value;
    /*alert(typeguest+","+typeroom+","+nights+","+rooms);*/
    
    var emmisions = null;
    var emmisionscost = null;    

    switch (typeguest) {
      case "leisure":
        switch(typeroom){
          case "Westin Room":  emmisions = 0.13; emmisionscost = 3.38; break;
          case "City View Room":    emmisions = 0.13; emmisionscost = 3.38; break;
          case "Deluxe Room":  emmisions = 0.13; emmisionscost = 3.38; break;
          case "Corner Studio":  emmisions = 0.14; emmisionscost = 3.64; break;
          case "Regent Suite":  emmisions = 0.16; emmisionscost = 4.16; break;
          default: document.getElementById("errorTyperoom").style.display="block"; break;
        }
        break;
      case "corporate":
        switch(typeroom){
          case "Westin Room":  emmisions = 0.23; emmisionscost = 5.98; break;
          case "City View Room":    emmisions = 0.23; emmisionscost = 5.98; break;
          case "Deluxe Room":  emmisions = 0.23; emmisionscost = 5.98; break;
          case "Corner Studio":  emmisions = 0.24; emmisionscost = 6.24; break;
          case "Regent Suite":  emmisions = 0.25; emmisionscost = 6.5; break;
          default: document.getElementById("errorTyperoom").style.display="block"; break;
        }
        break;
      default:
        document.getElementById("errorTypeguest").style.display="block";
        break;
    }
    
    /*alert(emmisions +","+emmisionscost);*/
    emmisions=emmisions*rooms*nights;
    emmisionscost=emmisionscost*rooms*nights*1.1;
    
    document.getElementById('emissions').innerHTML = emmisions.toFixed(2) + " CO2-e";
	document.getElementById('emissionsscost').innerHTML = "$" + emmisionscost.toFixed(2) + " including GST";
		
	document.getElementById('emissions2').value = emmisions.toFixed(2) + " CO2-e";
	document.getElementById('emissionscost2').value = "$" + emmisionscost.toFixed(2) + " including GST";
  }