Allow a cx google custom search engine ID to be specified.

www/index.php

@@ -18,6 +18,7 @@ if (isset($_GET['u'])
     && preg_match('/^https?/', $_GET['u'])
     && filter_var($_GET['u'], FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED)
     && $scanned = @file_get_contents($_GET['u'])) {
+    // Add local site search results
     $scanned = new UNL_Templates_Scanner($scanned);
     if (isset($scanned->navlinks)) {
         require_once 'HTMLPurifier.auto.php';
@@ -36,10 +37,17 @@ if (isset($_GET['u'])
             $page->contactinfo = $purifier->purify($scanned->contactinfo);
         }
     }
-    $context = 'http://www1.unl.edu/search/linkedcse/?u='.$_GET['u'];
+    
+    if (isset($_GET['cx'])) {
+        // Use their custom search engine instead of the linked one.
+        $context = '"'.htmlentities($_GET['cx']).'"';
+    } else {
+        // Auto-build a custom search engine
+        $context = '{crefUrl :"http://www1.unl.edu/search/linkedcse/?u='.$_GET['u'].'"}';
+    }
     $page->addScriptDeclaration('
         UNL_Search.do_local_search = true;
-        UNL_Search.local_search_context = "'.$context.'";
+        UNL_Search.local_search_context = '.$context.';
     ');
     $local_results = '
     <h3 class="sec_header">Local Results</h3>

www/searchFunc.js

@@ -34,7 +34,7 @@ function searchInit() {
 	
 		UNL_Search.local_search = new google.search.WebSearch();
 		//Apply the Custom Search Engine
-		UNL_Search.local_search.setSiteRestriction({crefUrl : UNL_Search.local_search_context});
+		UNL_Search.local_search.setSiteRestriction(UNL_Search.local_search_context);
 		//UNL_Search.local_search.setSiteRestriction('000150017203523626721:-1etga1qfci');
 		UNL_Search.local_search.setResultSetSize(GSearch.SMALL_RESULTSET)
 		UNL_Search.local_search.setSearchCompleteCallback(UNL_Search, UNL_Search.handleLocalResults)