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(email,"Please complete name and email address")==false)
  {email.focus();return false}
if (validate_required(name,"Please complete name and email address")==false)
  {name.focus();return false}
}
}