菜鸟教程在线编辑器

 
                <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>

<script>
var str="Visit RUNOOB!";
var patt1=/RUN/g;

if(patt1.global)
{
    document.write("g 模式有设置!");
}
else
{
    document.write("g 模式没有设置!");
}
</script>

</body>
</html>
              