JavaScript获得鼠标的X,Y坐标

<script language="javascript">
//取鼠标位置
document.onmousemove = mouseMove;
var mouse_x,mouse_y;
function mouseMove(e) {
    if(!document.all){
        mouse_x=e.pageX;
        mouse_y=e.pageY;
    }else{
        mouse_x=document.body.scrollLeft+event.clientX;
        mouse_y=document.body.scrollTop+event.clientY;
    }
    //便于跟踪调试
    window.status = "x= " + mouse_x + " y= " + mouse_y;
}

//返回x坐标
function getX()
{
    return mouse_x;
}

//返回y坐标
function getY()
{
    return mouse_y;
}
</script>