Really useful when used in conjunction with SubmitToTab
// ==UserScript==
// @name JIRA Quick Search Submit Button
// @namespace http://mailerdaemon.home.comcast.net
// @description Really useful when used in conjunction with SubmitToTab
// @include */jira.*
// @include */jira/*
// @include *.jira.*
// @version 0.0.1.20140517011138
// ==/UserScript==
if(form = document.forms.namedItem("quicksearch"))
{
span = document.createElement("span");
span.className="navItem";
span.innerHTML = "<input type='submit' name='submit' value='S' class='quickSearchInput'/>";
form.appendChild(span);
}