function checkOut() {
       if (document.form1.FirstName.value.length <1 ) 
{alert ("Please enter your First Name") 
       return false}
       if (document.form1.Surname.value.length <1 ) 
{alert ("Please enter your Surname") 
       return false}
       if (document.form1.Email.value.indexOf('@') == -1 )
{alert ("Please enter a valid E-mail") 
       return false}
       
       
      if (document.form1.Telephone.value.length >0 ) 
{
if (isNaN (document.form1.Telephone.value)) {
  // Not A Number
  alert('Please enter a valid Telephone no.') ;
  return false
}
}  
 

       
//document.form1.refcheck.value = document.referrer     
document.form1.submit()
return true
}