Suitelet create custom button on form

Hello All,

I have sucsesfully created a custom form using a suitlet but don't quite understand how to call a function from a custom button. This is an example of how I have constructed my form.

 function initiateForm(request, response) {         if ( request.getMethod() == 'GET' )       {               // Create my fields                 // Create a custom button                 form.addButton('custombutton','test button', deleterecord());                 response.writePage( form );       }     else {         }  }    function deleterecord()  {      alert("TEST the function");  }   

My problem is is that deleterecord() is not being called and my test alert is not being dispalyed. Am I calling the function correctly from the  'custombutton' and is the function deleterecord() in the correct place withing my script or does it have to reside somewhere else?