function efface(form,name)
{
eval ( that = window.document [form] [name]);
if ( name == 'nom_exp' && that.value == 'Visiteur anonyme' )
{
that.value = '';
}
else if ( name == 'email_exp' && that.value == 'visiteur@sauvabelin.ch' )
{
that.value = '';
}
else if ( name == 'nom_recep' && that.value == 'Robert Baden Powell' )
{
that.value = '';
}
else if ( name == 'email_recep' && that.value == 'bp@scouts.org' )
{
that.value = '';
}
else return false;
}