Hi Miguel, you can use the click trigger of the checkbox:
<form> show secret: <input id="checkbox" type="checkbox"/> <div id="div"> secret field: <input type="text" /> </div> </from> $("#div").hide(); $("#checkbox").click(function(){ if ( this.checked ) { $("#div").show(); } else { $("#div").hide(); } }) by(e) Stephan 2009/2/18 shapper <mdmo...@gmail.com>: > > Hello, > > On a form how can I Show a fieldset when a checkbox is Selected and > Hide the same fieldset when the same checkbox is unselected? > > Thanks, > Miguel