PreSaveAction function with Email validation

PreSave.js

function validateEmail(email) { 
    var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(email);
} 


function PreSaveAction(){

    var emailBox = getFieldControl('Email','Text');
    if (!validateEmail(emailBox.val())) {
        var errorHtml = '<span class="ms-formvalidation"><span role="alert">Invalid email address<br></span></span>';
        emailBox.after(errorHtml);
        return false;
    }
    return true;
}

function getFieldControl(fieldName,fieldType)
{
    var control = $('[id^=' + fieldName + '_][id$=' + fieldType + 'Field]');
    return control;
}