navImageRotate = function( pe ) {
	new Ajax.Request( '/getnavimg.php', {
		method: 'get',
		onSuccess: function( response ) {
			var imgSrc = $( 'navimg' ).src;
			var newSrc = response.responseText;
			if ( newSrc != imgSrc )
				$( 'navimg' ).src = newSrc;
		}
	} );
}