let a = document.getElementById('iframe').value; 
    document.querySelector('#result').innerHTML = a;
    
    
     if (offsetHeight > offsetWidth){
        let rasn = offsetHeight - offsetWidth;
        document.getElementById('vid').style.heght = '30px';
            
    }else{
        let rasn = offsetWidth - offsetHeight;
        document.write('offsetWidth больше offsetHeight
');
        document.write('разн: ' + rasn + '; ');
    }



    let element = document.getElementById('span');
    let sp = ('Высота: ', offsetHeight);
    sp.innerHTML = element;