[f]获得鼠标坐标

相对文档获得鼠标坐标；

function getMouse(ev){

                var ev = ev || event;

                var scrollLeft = document.documentElement.scrollLeft||document.body.scrollLeft;

                var scrollTop = document.documentElement.scrollTop||document.body.scrollTop;

                return {x:scrollLeft+ev.clientX, y:scrollTop+ev.clientY};

            }