/* sands scroll */
var sandsScrollTimer = null;
var sandsScrollPause = 30;
var sandsScrollStep = 5;

function sandsScroll(_id,_direction){
	var sandsNavigation = document.getElementById(_id);

	switch(_direction){
		case "left":
			sandsNavigation.scrollLeft = (sandsNavigation.scrollLeft < 0) ? 0 : sandsNavigation.scrollLeft - sandsScrollStep;
			break ;
		case "right":
			sandsNavigation.scrollLeft = sandsNavigation.scrollLeft + sandsScrollStep;
			break ;
		case "up":
			sandsNavigation.scrollTop = (sandsNavigation.scrollTop < 0) ? 0 : sandsNavigation.scrollTop - sandsScrollStep;
			break ;
		case "down":
			sandsNavigation.scrollTop = sandsNavigation.scrollTop + sandsScrollStep;
			break ;
	}
}

function sandsStartScroll(_id,_direction){
	sandsScrollTimer = setInterval("sandsScroll('" + _id + "','" + _direction + "')", sandsScrollPause);
}

function sandsStopScroll(){
	clearInterval(sandsScrollTimer);
}