window.addEvent('domready', function() {
$(document.body).getElements('span.view_more').each(
		function(item){
			var current_number = 'descr_' + item.id.replace('vm_', '');
			var fx = new Fx.Slide(current_number); 
			fx.hide();
			item.addEvent('click', function(i){
				if(item.innerHTML == ">")
					{item.innerHTML = "v"}
				else
					{item.innerHTML = ">"}
 				fx.toggle();
 			});
});

});