长按按钮事件函数

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$.fn.longPress = function(fn) {

        var timeout = undefined;

        var $this = this;

        alert(this.length);

        for(var i = 0;i<$this.length;i++){

            $this[i].addEventListener(‘touchstart‘, function(event) {

                timeout = setTimeout(fn, 800);

                }, false);

            $this[i].addEventListener(‘touchend‘, function(event) {

                clearTimeout(timeout);

                }, false);

        }

        }

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$(select).longPress(function(index){

      alert("你已长按");

  });