菜鸟教程在线编辑器

AI 编程工具

 
                <!DOCTYPE html>
<html>
<body>
<script type="text/vbscript">

Dim x
document.write(IsEmpty(x) & "<br>")
x=10
document.write(IsEmpty(x) & "<br>")
x=Empty
document.write(IsEmpty(x) & "<br>")
x=Null
document.write(IsEmpty(x))

</script>
</body>
</html>


              