I have a form with a standard reset button coded thusly:
Trouble i
Here is something to get you started
$('form') // match your correct form
.find('input[type!=submit], input[type!=reset]') // don't reset submit or reset
.val(''); // set their value to blank
Of course, if you have checkboxes/radio buttons, you'll need to modify this to include them as well and set .attr({'checked': false});
edit
Paolo's answer is more concise. My answer is more wordy because I did not know about the :input selector, nor did I think about simply removing the checked attribute.