问题
I have a tall <ul> element that is used as a popover menu. The overflow-y is set to auto, and I can scroll up and down to see the <li> elements. In IE9, when I scroll the <ul> element down and then mouse over any of the <li> elements, the scrollbar jumps straight back to the top. This makes it impossible to select any items at the bottom of a long list.
Neither Firefox nor Chrome exhibit this behavior.
Is this a known IE issue?
来源：https://stackoverflow.com/questions/19799835/ul-with-vertical-scroll-jumps-to-top-in-ie9