function showDiv(szID,szNumPages) {
	document.getElementById('1').style.display = "none";
	document.getElementById('2').style.display = "none";
	
	if (szID==1) {
		document.getElementById('prev').style.display = "none";
	}
	else {
		document.getElementById('prev').style.display = "block";	
	}


	if (szID==szNumPages) {
		document.getElementById('next').style.display = "none";
	}
	else {
		document.getElementById('next').style.display = "block";	
	}
	
	document.getElementById(szID).style.display = "block";
}