//helper function: Left - extract 'n' chars from left
function Left(str, n){
   if (n <= 0)
         return "";
   else if (n > String(str).length)
         return str;
   else
         return String(str).substring(0,n);
}


// function to validate user input
function initValidation(){
/*
	var objForm = document.forms["frmBooking"];
	objForm.txtFirstName.required = 1;	objForm.txtFirstName.regexp = /^\w*$/;
	objForm.txtFirstName.err = 'Please enter a valid First Name';
	
	objForm.txtLastName.required = 1;	objForm.txtLastName.regexp = /^\w*$/;
	objForm.txtLastName.err = 'Please enter a valid Last Name';
	
	objForm.txtPhone_1.required = 1; objForm.txtPhone_2.required = 1; objForm.txtPhone_3.required = 1;
	objForm.txtPhone_1.err = 'Please enter a valid Phone Number';
	objForm.txtPhone_2.err = 'Please enter a valid Phone Number';
	objForm.txtPhone_3.err = 'Please enter a valid Phone Number';
	
	
	objForm.txtEmail.required = 1; objForm.txtEmail.err = 'Please provide a valid Email address';
	objForm.txtEmail.regexp = 'JSVAL_RX_EMAIL';
	
	objForm.txtReservationDate.required = 1; objForm.txtReservationDate.err = 'Reservation Date is required';
	objForm.cboLanesRequired.required = 1; objForm.cboLanesRequired.exclude = '0'; objForm.cboLanesRequired.err = 'Lanes required';
	objForm.cboHoursRequired.required = 1; objForm.cboHoursRequired.exclude = '0'; objForm.cboHoursRequired.err = 'Hours required';
	objForm.cboStartTime.required = 1; objForm.cboStartTime.exclude = '0'; objForm.cboStartTime.err = 'Choose a start time';
	objForm.cboPeopleInParty.required = 1; objForm.cboPeopleInParty.exclude = '0'; objForm.cboPeopleInParty.err = 'Choose the number of people in your party';	
*/
}