function countPanels(incr, pages, pagesize, recordcount) {
	var rew = document.getElementById("rew");
	var fwd = document.getElementById("fwd");
	var rew2 = document.getElementById("rew2");
	var fwd2 = document.getElementById("fwd2");

	rew.setAttribute("panel",parseInt(rew.getAttribute("panel"))+parseInt(incr));
	rew2.setAttribute("panel",parseInt(rew2.getAttribute("panel"))+parseInt(incr));
	fwd.setAttribute("panel",parseInt(fwd.getAttribute("panel"))+parseInt(incr));
	fwd2.setAttribute("panel",parseInt(fwd2.getAttribute("panel"))+parseInt(incr));
	
	if (parseInt(rew.getAttribute("panel"))<0) {
		rew.style.visibility="hidden";
		rew2.style.visibility="hidden";
	} else {
		rew.style.visibility="visible";
		rew2.style.visibility="visible";
	};
	if (parseInt(fwd.getAttribute("panel"))>=parseInt(pages)) {
		fwd.style.visibility="hidden";
		fwd2.style.visibility="hidden";
	} else {
		fwd.style.visibility="visible";
		fwd2.style.visibility="visible";
	};
	
	var range = document.getElementById("range");
	var range2 = document.getElementById("range2");
	var absolutepage = parseInt(range.getAttribute("panel"))+parseInt(incr)+1;
	var lowItem = pagesize * absolutepage - pagesize + 1;
	var uppItem = lowItem + pagesize - 1;

	if(uppItem>parseInt(recordcount)) {
		uppItem = recordcount;
	};
	if(lowItem!=uppItem) {
		range.innerHTML = "Articoli " + String(lowItem) + " - " + String(uppItem);
	} else {
		range.innerHTML = "Articolo " + String(lowItem);
	};
	
	range2.innerHTML = range.innerHTML;

	range.setAttribute("panel",parseInt(range.getAttribute("panel"))+parseInt(incr));
}