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var SupportsTouches = ("createTouch" in document);
var default = {
    StartEvent : SupportsTouches ? "touchstart" : "mousedown",//支持触摸式使用相应的事件替代
    MoveEvent : SupportsTouches ? "touchmove" : "mousemove",
    EndEvent : SupportsTouches ? "touchend" : "mouseup"
}