ممكن

<SCRIPT type=text/javascript>
function verify_passwords(password1, password2)
{
// do various checks, this will save people noticing mistakes on next page
if (password1.value == '' || password2.value == '')
{
alert('Fill out both password fields');
return false;
}
else if (password1.value != password2.value)
{
alert('Entered passwords do not match');
return false;
}
else
{
md5hash(password1, document.forms.register.password_md5);
md5hash(password2, document.forms.register.passwordconfirm_md5);
return true;
}
return false;
}
</SCRIPT>