var movement=530;
	var id_in = "maschera_in";
	//var max_left=-1720;
	var max_right=movement;
	var pos=0;
	function moveLeft(){
		//alert('sinistra');
		new_pos=pos-movement;
		//alert('new_pos ' + new_pos + ' pos ' +  parseInt(pos) + ' movement ' +  parseInt(movement));
		//if (new_pos!=(max_left)){
		if (new_pos>(max_left)){
			$("#" + id_in).animate({left: new_pos}, 500, function(){ pos=$("#" + id_in).css("left"); pos=pos.replace("px",""); });
		}
	}
	function moveRight(){
		//alert('destra');
		new_pos=parseInt(pos)+parseInt(movement);
		//alert('new_pos ' + new_pos + ' pos ' +  parseInt(pos) + ' movement ' +  parseInt(movement));
		if (new_pos!=max_right){
			$("#" + id_in).animate({left: new_pos}, 500, function(){ pos=$("#" + id_in).css("left"); pos=pos.replace("px",""); });
		}
	}