Magento Add Event onlick on System Configuration Custom Module Field -

nowhere can find definition search. in mymodule namespace/modulename/etc/system.xml have:

<faq_input translate="label">     <label>question collor: </label>     <comment>example: #000000</comment>     <frontend_type>text</frontend_type>     <sort_order>20</sort_order>     <show_in_default>1</show_in_default>     <show_in_website>1</show_in_website>     <show_in_store>1</show_in_store> </faq_input> 

i need add onclick event like:

<input type="text" onclik="code(myevent)" value="xxx" > 

you need use <frontend_model>, can find examples in core (eg in app/code/core/mage/catalog/etc/system.xml).

the frontend model must block inheriting mage_adminhtml_block_system_config_form_field, has _getelementhtml() method can apply own code form element before rendering it. eg :

protected function _getelementhtml(varien_data_form_element_abstract $element) {     $element->setonclick('launchexample();');     $html = $element->getelementhtml();     $html .= '<script type="text/javascript">function launchexample(){ alert("this example"); }</script>';     return $html; }