var pageUrl = self.location.href;

splitString = pageUrl.split("/")

var nr = splitString.length;
var page= splitString[nr-1];
var pag = page.split(".");
var redir = pag[0];


if (parent.location.href == self.location.href) {
    if (window.location.replace)
        window.location.replace('index.php?p='+redir);
    else
        // veroorzaakt wat problemen met de terug-knop, maar het werkt
        window.location.href = 'index.php?p='+redir;
}