function onChangeZip() {

	//alert ( "length=" + document.forms[0].zip.value.length );

	if ( document.forms[0].zip.value.length == 5 ) {
		//alert("In update section");
		updateCityState(document.forms[0].elements[0].value);
	}
	else {
		//alert("in else");
		Element.update("city_state", " ");
	}
};




function updateCityState(zip) {

	//alert("in update function: " + url);

	new Ajax.Updater(
		'city_state',
		url,
		{
			method: 'get',
			parameters: $('zip').serialize(true)
		});;

}