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// From: http://stackoverflow.com/questions/8098107/horizontal-swipe-slider-with-jquery-and-touch-devices-support
touch_object.prototype.handle_touchstart = function(e){
    if (e.targetTouches.length != 1){
        return false;
    }
    this.obj.style.zIndex = 100;
    e.preventDefault();
    this.startX = e.targetTouches[0].pageX - this.geometry.x;
    this.startY = e.targetTouches[0].pageY - this.geometry.y;
    /* adjust for left /top */
    this.bind_handler('touchmove');
    this.bind_handler('touchend');
}
touch_object.prototype.handle_touchmove = function(e) {
    e.preventDefault();
    if (e.targetTouches.length != 1){
        return false;
    }
    var x=e.targetTouches[0].pageX - this.startX;
    var y=e.targetTouches[0].pageY - this.startY;
    this.move(x,y);

}
touch_object.prototype.handle_touchend = function(e){
    this.obj.style.zIndex = 10;
    this.unbind_handler('touchmove');
    this.unbind_handler('touchend');
}