​x
 
<html>
<head>
<script>
myWindow = null;
function openWin(){
    if( myWindow != null ){
        myWindow.close();
    }
    myWindow=window.open('','','width=200,height=100');
    myWindow.document.write("<p>这个窗口可以地震</p>");
}
function closeWin(){
    if( myWindow != null ){
        myWindow.close();
    }
}
function startEQ()
{
richter=5
myWindow.moveBy(0,richter)
myWindow.moveBy(0,-richter)
myWindow.moveBy(richter,0)
myWindow.moveBy(-richter,0)
timer=setTimeout("startEQ()",10)
}
function stopEQ()
{
clearTimeout(timer)
}
</script>
</head>
<body>
​
<form>
<input type="button" onclick="openWin()" value="第一步：打开窗口">
<br />
<br />
<input type="button" onclick="startEQ()" value="接下来：开始地震">
<br />
<br />
<input type="button" onclick="stopEQ()" value="然后可以：停止地震">
<br />
<br />
<input type="button" onclick="closeWin()" value="最后一步：关闭窗口">
</form>
​
</body>
</html>