真实的答案:不，这是不可能的。

OK, I have just thought of a way. Overlay your page with a div that covers the whole document. Inside that, create (say) 2,000 x 2,000 <a> elements (so that the :hover pseudo-class will work in IE 6, see), each 1 pixel in size. Create a CSS :hover rule for those <a> elements that changes a property (let's say font-family). In your load handler, cycle through each of the 4 million <a> elements, checking currentStyle / getComputedStyle() until you find the one with the hover font. Extrapolate back from this element to get the co-ordinates within the document.

N.b.，别这样。

var x = 0;
var y = 0;

document.addEventListener('mousemove', onMouseMove, false)

function onMouseMove(e){
    x = e.clientX;
    y = e.clientY;
}

function getMouseX() {
    return x;
}

function getMouseY() {
    return y;
}

我想我可能有一个合理的解决方案，不用计算div和像素..哈哈

简单地使用动画帧或一个时间间隔的函数。你仍然需要一个鼠标事件一次，虽然只是启动，但技术上你可以把它放在任何你喜欢的地方。

从本质上讲，我们一直在跟踪一个虚拟div，没有鼠标移动。

// create a div(#mydiv) 1px by 1px set opacity to 0 & position:absolute;

下面是逻辑。

var x,y;


$('body').mousemove(function( e ) {

    var x = e.clientX - (window.innerWidth / 2);
    var y = e.clientY - (window.innerHeight / 2);
 }


function looping (){

   /* track my div position 60 x 60 seconds!
      with out the mouse after initiation you can still track the dummy div.x & y
      mouse doesn't need to move.*/

   $('#mydiv').x = x;    // css transform x and y to follow 
   $('#mydiv)'.y = y;

   console.log(#mydiv.x etc)

   requestAnimationFrame( looping , frame speed here);
}  

我实现了一个水平/垂直搜索，(首先让一个div充满垂直排列的竖线链接，然后让一个div充满水平排列的竖线链接，然后简单地看看哪个有悬停状态)，就像Tim Down上面的想法，它工作得相当快。遗憾的是，不工作在Chrome 32上的KDE。

jsfiddle.net/5XzeE/4/

不是鼠标位置，但是，如果你正在寻找当前光标位置(用例，如获取最后键入的字符等)，那么，下面的代码片段工作良好。 这将为您提供与文本内容相关的游标索引。

window.getSelection().getRangeAt(0).startOffset

真实的答案:不，这是不可能的。

OK, I have just thought of a way. Overlay your page with a div that covers the whole document. Inside that, create (say) 2,000 x 2,000 <a> elements (so that the :hover pseudo-class will work in IE 6, see), each 1 pixel in size. Create a CSS :hover rule for those <a> elements that changes a property (let's say font-family). In your load handler, cycle through each of the 4 million <a> elements, checking currentStyle / getComputedStyle() until you find the one with the hover font. Extrapolate back from this element to get the co-ordinates within the document.

N.b.，别这样。