Suppose the pattern attribute has been set to equal the regu…

Suppose the pattern attribute has been set to equal the regular expression ^\d{5}5$ within the tag for the accountNo field in a web form. This regular expression matches a text string of exactly five digits. What can you insert in the blank in the following JavaScript function to display a custom error message when the user enters something other than five digits, then tries to submit the form? let submitButton = document.getElementById(“submitButton”); submitButton.addEventListener(“click”, validateAccount); function validateAccount() {    let acc = document.getElementbyId(“accountNo”);    if (acc.validity.valueMissing) {       acc.setCustomValidity(“Please enter your account number”);    } _____ {       acc.setCustomValidity(“Account numbers have five digits”);    } else {       acc.setCustomValidity(“”);    } }