function nextPage(current, next){
	if(document.getElementById("page" + current).style.display == "block"){
		document.getElementById("page" + current).style.display = "none";
	}else{
	for(i=1; i<=next; i++){
		document.getElementById("page" + i).style.display = "none";
	}
		document.getElementById("page" + current).style.display = "block";
	}
}