You cannot embed double-quotes " within double-quotes without escaping them. Alternatively, replace the (inner) quotes with apostrophes ' as shown:
Code:
<input id="edit-pass--3" class="form-text required" type="password" maxlength="128" size="60" name="pass" onkeypress="jQuery('input').keydown(function(e) {if (e.keyCode == 13) {jQuery('#edit-submit--2').trigger('click');}});">
Your original code seems to indicate that you need to use & quot; - perhaps a restriction of Drupal? Then try & apos; instead (without the space).
BTW click() is a shortcut for
trigger('click').