function calcularRuta(){
    var aux = document.URL.split(location.host).pop();

    var url = aux.split('/');

    var a = 0;
    while(url.length > 0){
        var pos = url.pop();
        if(pos != '')
            a++
    }

    var ruta = '';
    for (i=1;i<=a;i=i+1){
        ruta += '../';
    }

    return ruta;
}