var showcaseScrolling = false;
var showcaseBandTiming = 10;
var showcaseBandScrollDelta = 5;

function showcaseBandScrollLeft( band )
{
	showcaseScrolling = true;
	setTimeout( function() {
		showcaseDoScroll(band, showcaseBandScrollDelta);
	}, showcaseBandTiming );
}

function showcaseBandScrollRight( band )
{
	showcaseScrolling = true;
	setTimeout( function() {
		showcaseDoScroll(band, -showcaseBandScrollDelta);
	}, showcaseBandTiming );
}

function showcaseBandScrollStop()
{
	showcaseScrolling = false;
}

function showcaseDoScroll( band, scrollBy )
{
	if( !showcaseScrolling ) {
		return;
	}
	band.scrollLeft = band.scrollLeft + scrollBy;
	setTimeout( function() {
		showcaseDoScroll(band,scrollBy);
	}, showcaseBandTiming );
}