<body>

   <div id="content"  style="position:relative; height:1000px; width:1000px; background-color:#666;">

    <div id="one" style="position:absolute;top:0px; left:0px; height:100px; width:100px; background-color:red;"></div>

    </div>

        <script>

          var one=document.getElementById('one')

          var x=0;

          var y=0;

          var xs=10;

          var ys=10;

          function scroll(){

              x+=xs;

              y+=ys;

              if(x>=document.getElementById('content').offsetWidth-one.offsetWidth-20 || x<=0)

              {

                  xs=-1*xs;

              }

            if(y>=document.getElementById('content').offsetHeight-one.offsetHeight-20 || y<=0)

              {

                  ys=-1*ys;

              }

              one.style.left=x;

              one.style.top=y;

          }

          dt=setInterval(scroll,100);

          one.onmouseover=function(){

          clearInterval(dt);    

          };

          one.onmouseout=function(){

          dt=setInterval(scroll,100);

          };

        </script>

</body>

下面舉一個簡單的例子。

例1

復制代碼代碼如下:

function show(){ trace("每隔一秒我就會顯示一次");}

var sh;sh=setInterval(show,1000);

clearInterval(sh);

例2

復制代碼代碼如下:

<form>

<input type="text" id="clock" size="35" />

<script language=javascript>

var int=self.setInterval("clock()",50)

function clock(){var t=new Date()

document.getElementById("clock").value=t

}

</script>

</form>

<div id="clock"></div>

<button onclick="int=window.clearInterval(int)">Stop interval</button>

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