Fill form

var rand1 = Math.floor(Math.random() * 1000);
var rand2 = Math.floor(Math.random() * 1000);

var formValues = {
    firstName: 'M',
    lastName: 'J',
    company: 'pl',
    phone: '9999181910',
    companyPhone: '9999181910',
    panNo: 'adps9393l',
    password: 'hooping2',
    numberOfTrucks: '9',
    city: 'Kanpur',
    email: 'someone' + rand1 + '_' + rand2 + '@s.com',
    userName: 'some' + rand1 + '_' + rand2
};

var f = document.forms[0];

f["trucker[user_attributes][first_name]"].value = formValues.firstName;
f["trucker[user_attributes][last_name]"].value  = formValues.lastName;
f["trucker[user_attributes][email]"].value = formValues.email;
f["trucker[user_attributes][primary_phone_no]"].value = formValues.phone;
f["trucker[user_attributes][password]"].value = formValues.password;
f["trucker[user_attributes][password_confirmation]"].value = formValues.password;
f["trucker[company_name]"].value = formValues.company;
f["trucker[user_attributes][username]"].value= formValues.userName;
f["trucker[fleet_size]"].value = formValues.numberOfTrucks;
f["trucker[office_phone_no]"].value = formValues.companyPhone;
f["trucker[pan_no]"].value = formValues.panNo;
f["trucker[city]"].value = formValues.city;
f["trucker[state]"].options[32].selected = "selected";