document._getElementById = document.getElementById;
document.getElementById = function(id) {
    var a = [];
    var o = document._getElementById(id);
    if (!o) return o;
    while (o.id != id) {
        a.push({i:o.id,e:o});
        o.id='';
        o = document._getElementById(id);
        if (!o) return o;
    }
    for (j=0,jj=a.length; j<jj; j++) a[j].e.id = a[j].i;
    a = null;
    return o;
}