Javascript and render attribute of command button

Question

i am setting the value of rendered attribute of h:commandButton using below code.
the button doesn't render even when the return value is true.
rendered="javascript: document.getElementById('firstName_').renderValue;
please help.
thanks.
hiren

Answer 1

JSF runs at the server side and produces HTML. Javascript runs at the client side and intercepts on the HTML DOM.
So what you're trying to do here is impossible.
If you want to render the button depending a contition in the server side, use serverside logic for that, e.g. JSF EL and/or backing beans. If you want to render the button depending on a condition in the client side, use clientside logic for that, e.g. Javascript + DOM which sets element.style.display to 'none' or 'block'.