Regular expression for LastName, FirstName with space

Question

I am using the below JS to enter name in LastName, FirstName format like this Clark, Michael and now I also probably need to allow names like this Tim Duncan, Vince Carter where these kinda names have space in between.

function validateName(txtbox) {
        var name = /^\w{1,20}\, \w{1,20}$/
        var check = document.getElementById(txtbox);
        if (check != null) {
            if (check.value != "") {
                if (!name.test(check.value)) {
                    alert('Please enter name in Last Name, First Name format');
                    document.getElementById(txtbox).focus();
                    return false;
                }
                else {
                    return true;
                }
            }
            else if (name.test(check.value)) {
                return true;
            }
            else if (check.value == "") {
                return true;
            }
        }
    }

Is there any way to achieve this by a change within the same Regex. Really appreciate suggestions and help.

Answer 1

^[\w ]{1,20}\, [\w ]{1,20}$

这应该为您工作。

Answer 2

Maybe this will meet your expectations.

/^\\s*(\\w{1,20} *[^,]*)+,\\s+(\\w{1,20}\\s*)+$/

However above regex will accept also multiple white spaces before and after name. If you want to force only one space character format you should use these regex:

/^(\\w{1,20} ?[^,]*)+, (\\w{1,20}( [^$]|$))+$/

Answer 3

您可以使用html5模式。

 <input type="text" title="Following format: FirstName LastName" pattern="^\\s*([\\w]{1,20}( |,)?)+\\s*,\\s+([\\w]{1,20} *)+$" />