code: function createTabbable(fnRedirectFocus) {
  			var oBlockSpan = document.createElement("span");
  
  			oBlockSpan.setAttribute("tabindex", 0);
  			oBlockSpan.addEventListener('focusin', fnRedirectFocus);
  
  			return oBlockSpan;
  		}
docs: Create a tabbable span for the block section of the control with according focus handling.
  
  @param {function} fnRedirectFocus Focus handling function
  @returns {object} The span element's DOM node
  @private