versions/0.2.2/oj.js
function _getInstanceOnElement(el){
    if ((el != null ? el.oj : 0) != null)
      return el.oj
    else
      return null
  }
function _getInstanceOnElement(el){
    if ((el != null ? el.oj : 0) != null)
      return el.oj
    else
      return null
  }
_getInstanceOnElement: Get a oj instance on a given element