function checkform (form) {
	
	
   var r=0;
   var message = "Before submiting your message please provide:\n";
 

if (form.name.value=="") {
     message += "\n- Your name";
     r++;
}

if (form.emailaddress.value=="") {
     message += "\n- Your email address";
     r++;
}

if (form.contactnumber.value=="") {
     message += "\n- Your contact number";
     r++;
}

if (form.message.value=="") {
     message += "\n- Your message";
     r++;
}




 if (r > 0) {
  alert(message);
     return false;
 }
 else{
  return true;
 }
 
 
}