获取鼠标的当前位置

<script type='text/javascript'>
function mousePosition(ev){
    if(ev.pageX || ev.pageY){
        return {x:ev.pageX, y:ev.pageY};
    }
    return {
        x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,
        y:ev.clientY + document.body.scrollTop - document.body.clientTop
    };
}
function mouseMove(ev){
    ev = ev || window.event;
    var mousePos = mousePosition(ev);
    $('#txtmouseposition').text(mousePos.x+":"+mousePos.y);
}
document.onmousemove = mouseMove;

</script>