function init() {
    new Ajax.Autocompleter(
        "arrivee",
        "update_arrivee",
        "/airports.php",
        {
            method: 'get',
	     paramName: 'city',
            minChars: 3,
	     frequency: 0.15,
	     afterUpdateElement : function (input, li) {
                document.AIR_ENTRY_FORM.iata_arrivee.value = li.id;
            }
        });

    new Ajax.Autocompleter(
        "depart",
        "update_depart",
        "/airports.php",
        {
            method: 'get',
	     paramName: 'city',
            minChars: 3,
	     frequency: 0.15,
	     afterUpdateElement : function (input, li) {
                document.AIR_ENTRY_FORM.iata_depart.value = li.id;
            }
       });

}