touchMoveOver.js

function touchMoveOut(evt) {
  var
        touchObj = {}
    ,   tolerance = 15
    ,   containment
    ,   px
    ,   py

  touchObj.coords = evt.touches[0] || evt.changedTouches[0]

  px = touchObj.coords.pageX
  py = touchObj.coords.pageY

  // @prob -> Life would be much easier with native supported 
  //          tap events. 
  //          evt.touches[0] refers to orginated DOM Element
  //          NOT to the actual element under the finger, sucks!
  
  // @solution -> (A) document.elementFromPoint(px, py) ?
  //              (B) store all possible candidates (DOM-Elements)
  //                  and compare their position (w,h + offset x,y)
  //                  with the current touch point.
  //              (C) @todo -> try to find another one!
}

document.addEventListener("touchmove", touchMoveOut, false)