function checksubmit()
    {
    // check for email
    if (document.login.email.value=="")
      {
       alert("please enter your email address")
       document.login.email.focus()
       return false
      }
    // check for password
    if (document.login.password.value=="")
      {
       alert("please enter your password")
       document.login.password.focus()
       return false
      }
     // if all ok, return true
     return true
   }