<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js" type="text/javascript"></script> <script type="text/javascript"> </script> <style type="text/css"> * { padding: 0px; margin: 0px; }.spandian {
background: black; font-size: 0; overflow: hidden; width: 2px; height: 2px; position: absolute; } </style></head><body> <span class='spandian' id="spandian">.</span></body></html><script type="text/javascript"> $(function () { var count = 10;//设置个数 for (var i = 1; i < count * 8; i++) { $("#spandian").after("<span class='spandian'>.</span>"); } }) //移动效果 window.document.onmousemove = function (e) { e = event || e; var left = e.clientX; var top = e.clientY; move(top, left); } //给每一个span定义位置 function move(top, left) { $(".spandian").each(function () { var len = 10 * 1; var aqrt = Math.sqrt(2) * 1; var index = $(this).index() * 1; var indexJ = parseInt(index / 8) * 1 + 1; var indexZ = parseInt(index % 8) * 1 + 1; var mtop = indexZ == 1 || indexZ == 5 ? 0 : indexZ == 2 ? -indexJ * len / aqrt : indexZ == 3 ? -indexJ * len : indexZ == 4 ? -indexJ * len / aqrt : indexZ == 6 ? indexJ * len / aqrt : indexZ == 8 ? indexJ * len / aqrt : indexJ * len; var mlef = indexZ == 3 || indexZ == 7 ? 0 : indexZ == 1 ? -indexJ * len : indexZ == 2 ? -indexJ * len / aqrt : indexZ == 4 ? indexJ * len / aqrt : indexZ == 5 ? indexJ * len : indexZ == 8 ? -indexJ * len / aqrt : indexJ * len / aqrt; var ttop = mtop + top; var llef = mlef + left; var span = $(this) setTimeout(function () { span.css({ top: ttop, left: llef }) }, index * 10) }) }</script>