Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.
importScriptURI('http://en.wikipedia.org/w/index.php?title=User:Drilnoth/toolkit.js&action=raw&ctype=text/javascript');

addOnloadHook(start_freesearch); //Initiates the script on page load

function start_freesearch(){ //Begins the script
 mw.util.addPortletLink('p-tb', 'javascript:freesearch_form()', 'Search free images', 'tb-freesearch', 'Find free images using Google'); //Add link in toolbox
}

function freesearch_form(){
 var floatbox = new Floatbox("Find free images using Google (Version by Dipankan001)");

 var mainform = floatbox.create_form();
 mainform.setAttribute("action", "javascript:freesearch_eval();");

 var searchterm = floatbox.form_input("text", "searchterm");
 searchterm.value = wgTitle;

 floatbox.form_append("label", "Search term(s)");

 floatbox.form_append("br");

 var submitbutton = floatbox.form_input("submit", "submit");
 submitbutton.value = "Search free images";
}

function freesearch_eval(){
 var w = window.open("http://images.google.com/images?as_rights=(cc_publicdomain|cc_attribute|cc_sharealike).-(cc_noncommercial|cc_nonderived)&as_eq=wikipedia+wikimedia&as_q=" + enc(id("floatbox-floatform").searchterm.value));
 id("content").removeChild(id("floatbox-main"));
}