jQuery(document).ready(function() {
		/* randomizza i primi 5 articoli */
		
		var ftime=leggiCookie('primavolta');
		/*volte successive */
		if(ftime=='si'){
			others();
		}
		/* prima volta allora setta un immagine di base */
		else{
			creaCookie('primavolta','si','no');
			firstime();
		}
	});
	
	/* genera un numero casuale tra lowVal e HighVal*/
	function randRange(lowVal,highVal) {
	   return Math.floor(Math.random()*(highVal-lowVal+1))+lowVal;
	}
		
	//setta i cookie in acm di modifica categoria box 1
	function creaCookie(name,value,expired){
		
		if(expired == 'no'){
		
			today=new Date();
			var expires=10;
			expires = expires*100*60*60*24;
			var expires_date= new Date(today.getTime() + (expires));
			document.cookie= name+"="+value+";expires="+expires_date.toGMTString()+";path=/";
		}
		else{
			today=new Date();
			var expires=30;
			expires = expires*100*60*60*24;
			var expires_date= new Date(today.getTime() - (expires));
			document.cookie= name+"="+value+";expires="+expires_date.toGMTString()+";path=/";
		}
	}
	function firstime(){
		jQuery("#img-santino").attr("style" , "background-Image:url(/contents/instance19/images/gallery/tophead1.jpg)"); 
	}
	function others(){
		imgHeader=new Array(
			"tophead1.jpg",
			"tophead2.jpg",
			"tophead3.jpg",
			"tophead4.jpg",
			"tophead5.jpg",
			"tophead6.jpg",
			"tophead7.jpg",
			"tophead8.jpg",
			"tophead9.jpg",
			"tophead10.jpg",
			"tophead11.jpg",
			"tophead12.jpg",
			"tophead13.jpg",
			"tophead14.jpg",
			"tophead15.jpg",
			"tophead16.jpg",
			"tophead17.jpg",
			"tophead18.jpg",
			"tophead19.jpg",
			"tophead20.jpg",
			"tophead21.jpg",
			"tophead22.jpg",
			"tophead23.jpg",
			"tophead24.jpg",
			"tophead25.jpg",
			"tophead26.jpg",
			"tophead27.jpg",
			"tophead28.jpg",
			"tophead29.jpg",
			"tophead30.jpg",
			"tophead31.jpg",
			"tophead32.jpg"
		);		
	
		var numrand=randRange(1,imgHeader.length)-1;
		/* se non ho un flash ma ho solo l'immagine*/
			
		jQuery("#img-santino").attr("style" , "background-Image:url(/contents/instance19/images/gallery/"+imgHeader[numrand]+")"); 
	}
	function leggiCookie(nomeCookie)
	{
	  if (document.cookie.length > 0)
	  {
		var inizio = document.cookie.indexOf(nomeCookie + "=");
		if (inizio != -1)
		{
		  inizio = inizio + nomeCookie.length + 1;
		  var fine = document.cookie.indexOf(";",inizio);
		  if (fine == -1) fine = document.cookie.length;
		  return unescape(document.cookie.substring(inizio,fine));
		}else{
		   return "";
		}
	  }
	  return "";
	}