function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false;}
else {return true}
}
}function validate_form(thisform)
{
with (thisform)
{
if (validate_required(fullname,"Name must be filled out!")==false)
  {fullname.focus();return false;}

if (validate_required(telephone,"Telephone must be filled out!")==false)
  {telephone.focus();return false;}

if (validate_required(message,"Please do not forget to leave your enquiry")==false)
  {message.focus();return false;}
  

}
}