function toggleMaxdistance() {

	var iValue = $.trim($(this).val());

	if (iValue.length != 5 || isNaN(iValue)) {
		$('#maxdistance').css('color', '#999');
		$('#searchdata_maxdistance').attr('disabled', 'disabled');
	} else {
		$('#maxdistance').css('color', 'inherit');	
		$('#searchdata_maxdistance').attr('disabled', '');
	}
}

function showPlzinfo() {
	$('#plzinfo').show();
}

function hidePlzinfo() {
	$('#plzinfo').hide();
}

$(document).ready(function() {
	$('#searchdata_plzort').keyup(toggleMaxdistance);
	$('#searchdata_plzort').blur(hidePlzinfo);
	$('#searchdata_plzort').focus(showPlzinfo);	
	$('#searchdata_plzort').trigger('keyup');
	hidePlzinfo();
});