function showtopvente(item) {
	for (x=1;x<=5;x++)
	{	
		var div1 = document.getElementById("topvente0"+x);
		if (div1.style.display == "block"){
		  div1.style.display = "none";
		}
		else {
		  div1.style.display = "none";
		}	
		var div2 = document.getElementById("select0"+x);
		div2.className= "select_off";
	}
	var lediv = document.getElementById("topvente0"+item);
	lediv.style.display = "block";
	if (item!='1') {
		var x = item-1;			
		var div2 = document.getElementById("select0"+x);
		div2.className= "select_up";
	}
	if (item!='5') {
		var y = parseFloat(item)+1;	
		var div3 = document.getElementById("select0"+y);
		div3.className= "select_down";
	}
	var div = document.getElementById("select0"+item);	
	div.className= "select_on";
}