puste elementy formy oprócz jQuery
// Bind an event handler to the "click" JavaScript event
$('#clear').click(function(){
// Selects all elements of type text and clear all
$('#parent > input:text:not(".ignore")').val('');
// For excluding Multiple inputs
$("input:text:not('#objective_time_period, #subjective_time_period')").val('');
});
Example : http://jsfiddle.net/3zVyv/1/
Lokesh003Coding