my local is 'en_IN' (ie Zend_Registry::get('Zend_Locale'))

I have to convert the local value to standard float number format

for example

1,235.23 => 1235.23

3.23 => 3.23

I have used the following code

Zend_Locale_Format::getFloat($value, array('locale' => Zend_Registry::get('Zend_Locale')));

it working fine for 1,235.23, and i get the answer 1235.23.

But when i give 3.23 , i get the error on this code

And the error shown as

'No localized value in 3.23 found', This issue is happening in the browser opera, when we set the language is English(IN)(en-IN)