// Salesforce Lead Object Form Validator

function validation(form) {
      
      
if(form.first_name.value == '') {

alert('Please enter your first name.');
form.first_name.focus();
return false;
}

if(form.last_name.value == '') {

alert('Please enter your last name.');
form.last_name.focus();
return false;
}

if(form.email.value == '') {

alert('Please enter your email address. Your email address will be kept private.');
form.email.focus();
return false;
}

if(form.phone.value == '') {

alert('Please enter your phone number. Your phone number will be kept private.');
form.phone.focus();
return false;
}

return true;
}