js模拟计算机病毒效果的时候，怎么样使他不停的跳出窗口，而且位置不一样。详解必采纳。如果是写在桌面上该怎么写？
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>病毒警告</title>
</head>
<body>
<input type="button" value="病毒警告" onclick="show()">
<input type="button" value="停止弹出" onclick="stop()">
<script>
var t;
function show(){
window.open("kongbai.html","新打开的窗口","height=100, width=400, top=50,left=50, toolbar=no, menubar=no, scrollbars=no, resizable=no,location=no, status=no");
t=setTimeout("show()",300);
}
function stop(){
clearTimeout(t);
alert("恭喜你，中奖了");
}
</script>
</body>
</html>
