Codefights isMAC48Address(inputString)

//sample solution
function isMAC48Address(inputString) {
    if(inputString.length!=17){
    return false;
    }
var regex = /^([0-9A-F]{2}[:-]){5}([0-9A-F]{2})$/;
    //document.writeln(regex.test(inputString));
    return regex.test(inputString);
}