fin=top.location.href.lastIndexOf('?');

if(fin<0){
fin = top.location.href.length;
inicio=top.location.href.lastIndexOf('/')+1;
paginalinkext=top.location.href;
actual = top.location.href.substring(inicio,fin);
}else{
inicio=top.location.href.lastIndexOf('/')+1;
fin=top.location.href.lastIndexOf('?')+1;
};

//alert(actual);
if(actual){
if(actual!='default.html'){
//redirigir
top.location='http://www.sgi-rd.org/default.html' + '?paginalinkext=' + paginalinkext;
}
}