Displaying url of website in google search result page

var h = document.getElementsByTagName('h3');
var span_s = '<span style=\"color:#BF1717;font-size:13px;font-weight:bold;\">';
var span_e = '</span>';

for(var i= 0;i<h.length;i++){
  if(h[i].className === 'r'){
    var mo = h[i].getElementsByTagName('a')[0].getAttribute('href');
    var element = document.createElement('div');
    element.innerHTML = span_s+mo+span_e;
    h[i].appendChild(element);
}
}