[TYPO3-dev] form valication

[Rocky Ou]

Hey,

In my extension I need to right some data validation function after the 
visitor submit the form. I do not want them to re-fill every single 
fields, therefore, I want to use $this->cObj->getUpdateJS($this->piVars, 
'test', '', 'name,address');. The html part for the template are:

<form 
action="index.php?id=98&amp;no_cache=1&amp;tx_signup_pi1[test]=test&amp;tx_signup_pi1[action]=submit&amp;tx_signup_pi1[name]=adfadsf&amp;tx_signup_pi1[address]=adfadsf&amp;tx_signup_pi1[slogan]=adfadsf" 
method="post" name="test">
<label for="tx_signup_pi1[name]">Name</label>
<input name="tx_signup_pi1[name]" type="text">
<label for="tx_signup_pi1[address]">Address</label>
<input name="tx_signup_pi1[address]" type="text">
<label for="tx_signup_pi1[slogan]">Slogan</label>
<input name="tx_signup_pi1[slogan]" type="text">
<input value="submit" type="submit">
</form>

But the fields are blank. Can any of you help me out please?

Blessings,
Rocky