$(document).ready(function(){
	$("#alteProd").click( function () {$("#submenu").toggle("slow"); } );
	var t=setTimeout("animDownUp($('#topImgHolder'), 4, 170)",3000); 

});

var contImg=1;
function animDownUp(obj, nrImg, imgHeight){
	if(contImg<nrImg){
		obj.animate({top:"-="+imgHeight+"px"},1000);	
		contImg++;
	}else{
		contImg=1;
		obj.animate({top:"+="+((nrImg-1)*imgHeight)+"px"},500);	
	}
	var t=setTimeout("animDownUp($('#topImgHolder'), 4, 170)",3000);
}