Javascript Regular Expression to match six-digit number

Question

I am trying to incorporate a regular expression i have used in the past in a different manner into some validation checking through JavaScript.

The following is my script:

    var regOrderNo = new RegExp("\d{6}");
    var order_no = $("input[name='txtordernumber']").val();
    alert(regOrderNo.test(order_no));

Why would this not come back with true if the txtordernumber text box value was a six digit number or more?

Answer 1

You have to escape your \ when used inside a string.

new RegExp("\\d{6}");

or

/\d{6}/

Answer 2

Insert an extra "\" in your regexp.

Answer 3

You need to escape your backslash. It's looking for "\d", not digits.

So...

var regOrderNo = new RegExp("\\d{6}");