function validate() {
if (document.getElementById("enquiry").Name.value == "" ){
  alert("Please enter a name");
  return false;
  }
  
else if (document.getElementById("enquiry").Company.value == "" ) {
  alert("Please enter a company name");
  return false;
  	}

else if (document.getElementById("enquiry").Address.value == "" ) {
  alert("Please enter an address");
  return false;
  	}
	
else if (document.getElementById("enquiry").Email.value == "" ) {
  alert("Please enter an email dddress");
  return false;
  	}
	
else if (document.getElementById("enquiry").Tel.value == "" ) {
  alert("Please enter a telephone number");
  return false;
  	}
  
 else {
 return true;
 }
 
}