function validate() {
if (document.getElementById("orderform").busname.value == "" ){
  alert("Please enter a Company name");
  return false;
  }

else if (document.getElementById("orderform").contactname.value == "" ) {
  alert("Please enter a Contact name");
  return false;
  	}
	
else if (document.getElementById("orderform").address.value == "" ) {
  alert("Please enter an Address");
  return false;
  	}
			
else if (document.getElementById("orderform").postcode.value == "" ) {
  alert("Please enter a Postcode");
  return false;
  }
  
 else {
 return true;
 }
 
}