获得 选中文字

             var userSelection, ss;
            if (window.getSelection) { 
                //现代浏览器
                userSelection = window.getSelection();
            } else if (document.selection) { 
                //IE浏览器 考虑到Opera，应该放在后面
                userSelection = document.selection.createRange();
            }
            if (!(ss = userSelection.text)) {
                ss = userSelection;
            }

目前在电脑上能用。移动端（uc）不能使用。

[移动开发]html5 手指触摸滑动事件[改进代码](jquery)

http://blog.sina.com.cn/s/blog_591e70ee0100tbdr.html

        //假定接受手指触摸事件的Dom对象id是"touchBox"
        document.getElementById("touchBox").addEventListener("touchstart", touchStart, false);
        document.getElementById("touchBox").addEventListener("touchmove", touchMove, false);
        document.getElementById("touchBox").addEventListener("touchend", touchEnd, false);

        function touchStart(event){
            var touch = event.touches[0];
            startY = touch.pageY;
        }

        function touchMove(event){
            var touch = event.touches[0];
            endY = (startY-touch.pageY);
            if(scrollTopVal==0){
                $("#touchBox").scrollTop((endY+100));
            }else{
                $("#touchBox").scrollTop(scrollTopVal+endY+100);
            } 


        }
        function touchEnd(event){
            scrollTopVal=$("#touchBox").scrollTop();
        }