Locating DOM element by absolute coordinates

Question

Is there a simple way to locate all DOM elements that \"cover\" (that is, have within its boundaries) a pixel with X/Y coordinate pair?

Answer 1

I couldn't stop myself to jump on Felix Kling's answer:

var $info = $('
', {
    css: {    
        position:    'fixed',
        top:         '0px',
        left:        '0px',
        opacity:     0.77,
        width:       '200px',
        height:      '200px',
        backgroundColor: '#B4DA55',
        border:      '2px solid black'
    }
}).prependTo(document.body);

$(window).bind('mousemove', function(e) {
    var ele = document.elementFromPoint(e.pageX, e.pageY);
    ele && $info.html('NodeType: ' + ele.nodeType + '
nodeName: ' + ele.nodeName + '
Content: ' + ele.textContent.slice(0,20));
});

updated: background-color !