function showpage(id, num) {
	
	if (document.getElementById) {
		
		for (i=1; i<=num; i++) {
			var page = "page_" + i;
			document.getElementById(page).style.display = "none";
		}
		
		var page = "page_" + id;
		document.getElementById(page).style.display = "block";
		
		return false;
		
	} else {
		return true;
	}
}