Subscript text in HTML

oCell = document.createElement("TD");
  oCell.innerHTML = data;
  oRow.appendChild(oCell);

oCell = document.createElement("TD");
oSub = document,createElement("sub");
oSub.innerHTML = data;
oCell.appendChild(oSub);
oRow.appendChild(oCell);

var newElem = document.createElement("sub");
newElem.appendChild(document.createTextNode("foobar"));
oCell.appendChild(newElem);

oCell.innerHTML = data+'<br /><sub>'+subText+'</sub>';

oCell.innerHTML = data+'<br />'+subText.sub();

oCell.appendChild(document.createTextNode(data));
oCell.appendChild(document.createElement('sub')).appendChild(document.createTextNode(subdata));