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.
// [[User:Lupin/popups.js]]   
//importScript('User:Lupin/popups.js');


 // [[User:Henrik/sandbox/google-search]] (please include this line)
 function install_search()
 {

 document.getElementById('searchBody').innerHTML+='<div>'+
 '<FORM method=get action="http://www.google.co.uk/search">'+
 '<input type=hidden name="ie" value="UTF-8" /><input type=hidden name="oe" value="UTF-8" />'+
 '<INPUT id="googleSearchInput" name="q" type="text" accesskey="f" value="" />'+
 '<input type="hidden" name="domains" value="en.wikipedia.org" />'+
 '<input type=radio name=sitesearch value="">Web'+
 '<input type=radio name=sitesearch value="en.wikipedia.org" checked />WP'+
 '<INPUT type="submit" name="btnG" VALUE="Google Search"  /></FORM></div>';


 
 window.setTimeout(function() {
 		var rs= document.getElementById('searchInput');
		var gs = document.getElementById('googleSearchInput');
		if(rs&&rs.value&&gs && gs.value.length==0){
			gs.value=rs.value;
		}

 	}, 100);
 }
 addOnloadHook(install_search);