<!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>飛動(dòng)的廣告</title>
  <style type="text/css">
    body,div,p
    {
      margin:0;
      padding:0;
      font-size:14px;
    }
    #divMain
    {
      width:200px;
      height:800px;
    }
  </style>
  <script type="text/javascript">
    var tmrID;
    var x = 1;
    var y = 1;
    function moveAD() {
      var divFly = document.getElementById("divFly");
      var moveX = parseInt(divFly.style.left) + x * 5;
      var moveY = parseInt(divFly.style.top) + y * 5;
      //divFly.offsetWidth
      if ((moveX + divFly.offsetWidth) >= document.body.clientWidth) {
        x = -1;
      }
      if ((moveY + divFly.offsetHeight) >= document.body.clientHeight) {
        y = -1;
      }
      if (moveX <= 0) {
        x = 1;
      }
      if (moveY <= 0) {
        y = 1;
      }
      divFly.style.left = moveX;
      divFly.style.top = moveY;
    }
    function ClearTimer() {
      clearInterval(tmrID);
    }
    function fly() {
      tmrID = setInterval(moveAD, 20);
    }
    window.onload = function () {
      var divFly = document.getElementById("divFly");
      divFly.onmouseover = function () {
        ClearTimer();
      }
      divFly.onmouseout = function () {
        fly();
      }
      fly();
    }
    function closeAD() {
      ClearTimer();
      var divFly = document.getElementById("divFly");
      divFly.style.display = "none";
    }
  </script>
</head>
<body>
  <div id="divMain"></div>
  <div id="divFly" style="position:absolute;top:0;left:0;border:1px solid green;">
    <img src="../images/fly.gif" height="60px" width="60px" />
    <p><a href="javascript:void(0)" onclick="closeAD()">關(guān)閉</a></p>
  </div>
</body>
</html>

希望本文所述對(duì)大家的javascript程序設(shè)計(jì)有所幫助。

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