How to fill in form field, and submit, using javascript?

Question

If I have an html document whose rough structure is

        
                      

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Answer 1

You can try something like this:

    <script type="text/javascript">
        function simulateLogin(userName)
        {
            var userNameField = document.getElementById("username");
            userNameField.value = userName;
            var goButton = document.getElementById("go");
            goButton.click();
        }

        simulateLogin("testUser");
</script>

Answer 2

document.getElementById('username').value = 'foo';
document.getElementById('login_form').submit();

Answer 3

document.getElementById('username').value="moo"
document.forms[0].submit()

Answer 4

It would be something like:

document.getElementById("username").value="Username";
document.forms[0].submit()

Or similar edit: you guys are too fast ;)

Answer 5

This method helped me doing this task

document.forms['YourFormNameHere'].elements['NameofFormField'].value = "YourValue"
document.forms['YourFormNameHere'].submit();