Feature/#32 more sharing

It may be a work in progress, but to work on my phone it seems this line have to be replaced by something like:
```javascript
  var i = 0, share = "", radioList = document.forms["share-form"].elements["radio-share"];
  for (i=0; i<radioList.length; i++) {
    if (radioList[i].checked) {
      share = radioList[i].value;
    }
  }
```