function prev(n) {
    if (n == 1) {
        location.href = "index.php";
    } else {
        location.href = "page" + n + ".php";
    }
}

function next(n) {
    location.href = "page" + n + ".php";
}

function popUp(url) {
	newwindow=window.open(url,'height=1024, width=768 scrollbars=yes');
	if (window.focus) {newwindow.focus()}
	return false;
}