BlackBerry webkit javascript touch events

var lastX=0;
var lastY=0;
document.ontouchstart = function(event) {
    var touchEvent = event.changedTouches[0];
    lastX = touchEvent.pageX;
    lastY = touchEvent.pageY;
}

document.ontouchmove = function(event) {
    event.preventDefault();
}

document.ontouchend = function(event) {
    var touchEvent = event.changedTouches[0];
    var deltaX = lastX - touchEvent.pageX;
    var deltaY = lastY - touchEvent.pageY;
    alert("deltaX: " + deltaX + " deltaY: " + deltaY);
}


For android and iPhone, it can be 

startPoint.x = e.touches[0].pageX;
startPoint.y = e.touches[0].pageY;

General codes:

if(!e['touches']) e['touches'] = e.changedTouches;
     
startPoint.x = e.touches[0].pageX;
startPoint.y = e.touches[0].pageY;