div+css，实现图片跟随鼠标任意移动

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>
            鼠标的距离
        </title>
        <script type="text/javascript">
            var mouseX;
            var mouseY;
            function show() {
                var infoDiv = document.getElementById('infoDiv');
                mouseOver();
                document.getElementById("a").innerHTML = mouseX + " " + mouseY;
                infoDiv.style.display = "block";
                infoDiv.innerHTML = mouseX + " " + mouseY;
                infoDiv.style.left = mouseX + 10 + "px";
                infoDiv.style.top = mouseY + 10 + "px";
            }
            function hide() {
                var infoDiv = document.getElementById('infoDiv').style.display = "none";;
            }
            function mouseOver() {
                e = event || window.event;
                // 此处记录鼠标停留在组建上的时候的位置, 可以自己通过加减常量来控制离鼠标的距离. 
                mouseX = e.layerX || e.offsetX;
                mouseY = e.layerY || e.offsetY;
            }
        </script>
    </head>
     
    <body>
        <div onmousemove="show();" onmouseout="hide();" style="margin:150px ; background:#ff0; height:300px; width:300px; position:relative; ">
            鼠标相对于触发事件元素的位置
            <strong id="a">
            </strong>
            <div id="infoDiv" style="display: none; position: absolute; width: 100px; height: 100px; background-color: #F1F19B;">
            </div>
        </div>
    </body>
 
</html>
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