function checkform ( form ) {
if (form.Name.value == "") { alert( "Please enter your name." ); form.Name.focus(); return false ;  }
if (form.Email.value == "") {  alert( "Please enter your email address." );  form.Email.focus();  return false ;  }
if (form.Comment.value == "") {   alert( "Please enter your comment." ); form.Comment.focus();    return false ;  }
return true ;}

function checkJoinform ( form ) {
if (form.Name.value == "") { alert( "Please enter your name." ); form.Name.focus(); return false ;  }
if (form.Email.value == "") {  alert( "Please enter your email address." );  form.Email.focus();  return false ;  }
return true ;}