String对象的Replace()

<!DOCTYPE html>
<html>
    <head>
</head>
<body>
   <script type="text/javascript">
        var x="2015-01-30-15";
        var y="2015-01-30-15";
        var z="2015-01-30-15";
        //默认情况下只替换第一个
        console.log(x.replace("-","/"))
        
        //如果要想替换多个或全部，请用for循环
        for (var i=0; i<2; i++) {
            var y=y.replace("-","/")
        }
        console.log(y)
        
        
        //如果只替换全部，请考虑正则
        console.log(z.replace(/-/g,"/"))
    </script>
</body>
</html>