var scroller;
var interval = 200;
var step = 100;

Event.observe( window, 'load', function() {
	
	scroller = $('navstrip');
	window.setTimeout( scroll, interval );
});

function scroll() {
	
	var ele_left = scroller.getStyle('left');
	var current_left = parseInt( ele_left.substr(0,ele_left.length-2));
	
	if( current_left > 0 ) {
		var new_left = current_left - step;
		if( new_left < 0 ) new_left = 0;
		scroller.setStyle( { left: new_left+'px' } );
		window.setTimeout( scroll, interval );
	}
	
}