function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

//Function for onlinebooking
function Online_Booking() 
{
	var url = "online_booking_form.php";
	window.open(url,"","height=400,width=635,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1"); 	
}

function trim(inputString) 
{
   // Removes leading and trailing spaces from the passed string. Also removes
   // consecutive spaces and replaces it with one space. If something besides
   // a string is passed in (null, custom object, etc.) then return the input.

   if (typeof inputString != "string") { return inputString; }
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
   while (ch == " ") { // Check for spaces at the beginning of the string
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length-1, retValue.length);
   while (ch == " ") { // Check for spaces at the end of the string
      retValue = retValue.substring(0, retValue.length-1);
      ch = retValue.substring(retValue.length-1, retValue.length);
   }
   while (retValue.indexOf("  ") != -1) { // Note that there are two spaces in the string - look for multiple spaces within the string
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); // Again, there are two spaces in each of the strings
   }
   return retValue; // Return the trimmed string back to the user

} // Ends the "trim" function

//Check to validate the email address
function isEmailAddr(email)
{
  var result = false
  var theStr = new String(email)
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function highlightTextField(field) {
		field.style.borderColor = 'red';
		field.style.borderStyle = 'solid';
		field.style.borderWidth = '1px;';
}

function nohighlightTextField(field) {
		field.style.borderColor = '';
		field.style.borderStyle = '';
		field.style.borderWidth = '';
}

function highlightSelectField(field) {
		field.style.backgroundColor = 'red';
		field.style.color = 'black';
}		

function nohighlightSelectField(field) {
		field.style.backgroundColor = '';
		field.style.color = '';
}	

function check_textfield(field, fieldname, ErrorMsg)
{
	trimmed_string = trim(field.value);
	if (trimmed_string.length == 0) 
	{
		ErrorMsg = ErrorMsg + '- ' + fieldname + '\n';
		highlightTextField(field);
		field.focus();
	}
	else
	{	nohighlightTextField(field);	}
return ErrorMsg;
}

function check_selectfield(field, fieldname, ErrorMsg)
{
	if(field.value == "")
	{
		ErrorMsg = ErrorMsg + '- ' + fieldname + '\n';
		highlightSelectField(field);
		field.focus();
	}
	else
	{	nohighlightSelectField(field);	}

return ErrorMsg;
}

function check_email(field, fieldname, ErrorMsg)
{
	if(!isEmailAddr(field.value))
	{
		ErrorMsg = ErrorMsg + '- ' + fieldname + '\n';
		highlightTextField(field);
		field.focus();
	}
	else
	{	nohighlightTextField(field);	}

return ErrorMsg;
}

function validateForm()
{
	var ErrorMsg = '';

	ErrorMsg = check_selectfield(document.onlinebooking.pickup_month, "Pick Up Date: Month", ErrorMsg);
	ErrorMsg = check_selectfield(document.onlinebooking.pickup_day, "Pick Up Date: Day", ErrorMsg);
	ErrorMsg = check_selectfield(document.onlinebooking.pickup_year, "Pick Up Date: Year", ErrorMsg);

	ErrorMsg = check_selectfield(document.onlinebooking.pickup_hour, "Pick Up Time: Hour", ErrorMsg);
	ErrorMsg = check_selectfield(document.onlinebooking.pickup_min, "Pick Up Time: Minutes", ErrorMsg);

	ErrorMsg = check_selectfield(document.onlinebooking.car_type, "Car Type", ErrorMsg);
	ErrorMsg = check_selectfield(document.onlinebooking.pickup_type, "Pick Up Type", ErrorMsg);

	ErrorMsg = check_textfield(document.onlinebooking.pickup_address, "Address or Airport Name", ErrorMsg);
	ErrorMsg = check_textfield(document.onlinebooking.pickup_city, "City or Arriving From", ErrorMsg);

	ErrorMsg = check_textfield(document.onlinebooking.address, "Destination: Address", ErrorMsg);
	ErrorMsg = check_textfield(document.onlinebooking.dest_city, "Destination: City", ErrorMsg);

	ErrorMsg = check_textfield(document.onlinebooking.fname, "First Name", ErrorMsg);
	ErrorMsg = check_textfield(document.onlinebooking.lname, "Last Name", ErrorMsg);

	ErrorMsg = check_email(document.onlinebooking.email, "Email", ErrorMsg);

	ErrorMsg = check_textfield(document.onlinebooking.phone, "Phone", ErrorMsg);

	ErrorMsg = check_selectfield(document.onlinebooking.num_passengers, "Number of Passengers", ErrorMsg);
	ErrorMsg = check_selectfield(document.onlinebooking.num_luggage, "Number of Bags", ErrorMsg);

	if( (document.onlinebooking.num_passengers.value > 1) || (document.onlinebooking.num_passengers.value == 'more than 4') )
	{
		ErrorMsg = check_textfield(document.onlinebooking.passengers, "Please specify Passengers when more than 1", ErrorMsg);
	}


	if(ErrorMsg != '') 
	{
		alert('Please complete ALL the following fields to continue:\n' + ErrorMsg);
		return false;
	} 
	else 
	{	
		return true;
	}
}