function validateForm(spa_booking)
{
 var why = "";
	  if(""==document.forms.spa_booking.f_name.value)
	  {
	  why += "Please enter your first name.\n";
	  }  
	  if(""==document.forms.spa_booking.l_name.value)
	  {
	  why += "Please enter your last name.\n";
	  }    
	  if(""==document.forms.spa_booking.e_mail.value)
	  {
	  why += "Please enter your contact e-mail.\n";
	  }    
	  if(""==document.forms.spa_booking.number_person.value)
	  {
	  why += "Please enter your number of person.\n";
	  }    
	  if(""==document.forms.spa_booking.date_treatment.value)
	  {
	  why += "Please enter your date of treatment.\n";
	  } 
	  if(""==document.forms.spa_booking.hotel_samui.value)
	  {
	  why += "Please enter your hotel on samui.\n";
	  }    	  
	  if(document.getElementById("checkbox7").checked == true)
	  {
	  	selectoption=1;
	  }
	  if(selectoption==0)
	  {
	  why += "Please choose your enquiry.\n";  
	  }  
  if (why != "") {
       alert(why);
       return false;
    }
return true;
}