var valid = false;
var enter = function(){
    document.location.href = url;
};
try{
    if (document.location==window.top.location){
        valid=true;
    }
}catch(e){
}
try{
    if (!(document.layers)) document.domain = "eplus.de";
    var dm = document.domain;
    var pdm = parent.document.domain;
    if (dm==pdm){
        valid=true;
    }
}catch(e){
}