function validate_form(form_name)
{
var reNumber=/^\d+$/;
   if(form_name.name){
	   if(!form_name.name.value)
	  {
		alert ('Please enter your Name.');
		form_name.name.focus();
		return false;
	  }
  }
  if(form_name.tel){
    if(!form_name.tel.value || !reNumber.test(form_name.tel.value))
	  {
		alert ('Please enter your Telephone.');
		form_name.tel.focus();
		return false;
	  }
  }
  if(form_name.email){
	  if(!form_name.email.value || (form_name.email.value && (form_name.email.value.indexOf("@") == -1 || form_name.email.value.indexOf(".") == -1)))
	  {
		alert ('Please enter your Email Address.');
		form_name.email.focus();
		return false;
	  }
  }
  if(form_name.location){
	  if(!form_name.location.value)
	  {
		alert ('Please enter your Location.');
		form_name.location.focus();  
		return false;
	  }
  }
  if (form_name.nationality){
	  if(!form_name.nationality.value)
	  {
		alert ('Please enter your Nationality.');
		form_name.nationality.focus();
		return false;
	  }
  }
  
//alert ("Your question has been sent");
    return true;




}