请问代码那有问题?
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>系好安全带,准备启航</title>
<!--引入外部文件的方式-->
<script type="text/javascript">
function go()
{
var zou=confirm("点击");
if (zou==true)
{
document.write("准备好,起航吧");
}
else{
document.write("ssssswandanle ");
}
}
</script>
</head>
<body>
<input type="button" onclick="go" value="点击">
</input>
</body>
</html>