function max_min() {
  if (document.pack.maxt.value != "m" && document.pack.mint.value != "m") {
	if (parseInt(document.pack.maxt.value) >= 0 || parseInt(document.pack.mint.value) >= 0) {
	  if (parseInt(document.pack.maxt.value) < parseInt(document.pack.mint.value)) {
		alert("De minimum temperatuur moet lager zijn dan de maximum temperatuur");
		document.pack.maxt.value = "m"
	  }
	} else if (parseInt(document.pack.maxt.value) == 0 || parseInt(document.pack.mint.value) == 0) {
	  if (parseInt(document.pack.maxt.value) < parseInt(document.pack.mint.value)) {
		alert("De minimum temperatuur moet lager zijn dan de maximum temperatuur");
		document.pack.maxt.value = "m"
      }
	} else {
	  if (parseInt(document.pack.maxt.value) < parseInt(document.pack.mint.value)) {
		alert("De minimum temperatuur moet lager zijn dan de maximum temperatuur");
		document.pack.maxt.value = "m"
      }
	}
  }
}

function min_max() {
  if (document.pack.maxt.value != "m" && document.pack.mint.value != "m") {
	if (parseInt(document.pack.maxt.value) >= 0 || parseInt(document.pack.mint.value) >= 0) {
	  if (parseInt(document.pack.maxt.value) < parseInt(document.pack.mint.value)) {
		alert("De minimum temperatuur moet lager zijn dan de maximum temperatuur");
		document.pack.mint.value = "m"
	  }
	} else if (parseInt(document.pack.maxt.value) == 0 || parseInt(document.pack.mint.value) == 0) {
	  if (parseInt(document.pack.maxt.value) < parseInt(document.pack.mint.value)) {
		alert("De minimum temperatuur moet lager zijn dan de maximum temperatuur");
		document.pack.mint.value = "m"
	  }
	} else {
      if (parseInt(document.pack.maxt.value) < parseInt(document.pack.mint.value)) {
		alert("De minimum temperatuur moet lager zijn dan de maximum temperatuur");
		document.pack.mint.value = "m"
	  }
	}
  }
}  

function form_n(step) {
    document.pack.action = "index.php";
    document.pack.target = "";
    document.pack.onSubmit = "";
    document.pack.pagestep.value = step;
    document.pack.submit();
}

function checkstep(step) {
  if (step == "step2" && document.pack.check_step.value > 2 ) {
    alert(document.pack.check_step.value);
  } else if (step == "step3" && document.pack.check_step.value > 3) {
    alert(document.pack.check_step.value);
  } else if (step == "step4" && document.pack.check_step.value > 4) {
    alert(document.pack.check_step.value);
  } else {
    alert(document.pack.check_step.value);
    form_n(step);
  }
}

function checknull(step) {
  if (step == "step2") {
	var check_country = '';
	var check_weather = '';
	var check_local_tan = '';
	var check_trip_type = '';
	var check_trip_act = '';
	var check_vihicle = '';
	var check_accom = '';
	var check_tra_qty = '';
    
	for (i=0; i < document.pack.qty_destination.value; i++) {
	  if (document.getElementById("country" + i).value != "0") {
	    check_country = "T";
	  }
	}
	for (j=0; j < document.pack.qty_weather.value; j++) {
      if (document.getElementById("weather" + j).checked) {
		  check_weather = "T";
	  }
	}
	if (check_country != "T") {
	  alert("Kies een bestemming");
	} else if (check_weather != "T") {
	  alert("Vul het type weer in.");
	} else if (document.pack.maxt.value == "m") {
	  alert("Vul de maximum temperatuur in.");
	} else if (document.pack.mint.value == "m") {
	  alert("Vul de minimum temperatuur in.");
	} else {
	  document.pack.check_step2.value = "T";
	  document.pack.pagestep.value = step;
	  document.pack.submit();  
	}	
  } else if (step == "step3") {
	for (i=0; i < document.pack.qty_local_tan.value; i++) {
	  if (document.getElementById("localtan" + i).checked) {
		check_local_tan = "T";
	  }
	}
	if (check_local_tan != "T") {
	  alert(" Kies vervoer naar uw bestemming.");
	} else {
	  document.pack.check_step3.value = "T";
	  document.pack.pagestep.value = step;
	  document.pack.submit();
	}
  } else if (step == "step4") {
	for (i=0; i < document.pack.qty_trip_type.value; i++) {
	  if (document.getElementById("triptype" + i).checked) {
	    check_trip_type = "T";
	  }
	}	
	for (j=0; j < document.pack.qty_trip_act.value; j++) {
	  if (document.getElementById("tripact" + j).checked) {
		check_trip_act = "T";
	  }
	}
	for (k=0; k < document.pack.qty_vihicle.value; k++) {
	  if (document.getElementById("vihicle" + k).checked) {
		check_vihicle = "T";
	  }
	}
	for (l=0; l < document.pack.qty_accom.value; l++) {
	  if (document.getElementById("accom" + l).checked) {
		check_accom = "T";
	  }
	}
	if (check_trip_type != "T") {
	  alert("Vul soort reis in.");
	} else if (check_trip_act != "T") {
	  alert("Vul activiteiten in.");
	} else if (check_vihicle != "T") {
	  alert("Vul vervoer op bestemming in.");
	} else if (check_accom != "T") {
	  alert("Vul accommodatie in.");
	} else {
	  document.pack.check_step4.value = "T";
	  document.pack.pagestep.value = step;
	  document.pack.submit();
	}	
  } else if (step == "step5") {
	for (i=0; i < document.pack.tra_qty.value; i++) {
	  if (document.getElementById("tragen" + i).value != "0" && document.getElementById("trayear" + i).value != "0" && document.getElementById("trapack" + i).value != "0") {
	    check_tra_qty = "T";
	  }
	}
	if (check_tra_qty != "T") {
	  alert("Vul alle gegevens in.");
	} else {
	  document.pack.check_step5.value = "T";
	  document.pack.pagestep.value = step;
	  document.pack.submit();  
	}	
  } else {
	document.pack.pagestep.value = step;
	document.pack.submit();  
  }  
}

function popup_print(url) {
  document.pack.action = url;
  document.pack.target = "printtarget";
  document.pack.onSubmit = window.open("about:blank","printtarget","width=640, height=600, scrollbars=yes" );
  document.pack.submit();  
}
function popup_email(url) {
  document.pack.action = url;
  document.pack.target = "emailtarget";
  document.pack.onSubmit = window.open("about:blank","emailtarget","width=400, height=250, top=200, left=300, toolbar=no, status=no, scrollbars=no" );
  document.pack.submit();  
}

function add_item() {
  var from = document.pack; 
  if (from.nameadd.value == "" || from.nameadd.value == null) {
	alert('Please add Item ');
  } else {
	from.add_qty_item.value++;
	form_n('step5');
  }
}