Support setting query form values via plugins

Change-Id: I75de9d725ab8be72acd03c5f84ac68355a0c45a1
diff --git a/dev/demo/plugin-server.html b/dev/demo/plugin-server.html
index 98cbac0..6a1e12f 100644
--- a/dev/demo/plugin-server.html
+++ b/dev/demo/plugin-server.html
@@ -18,7 +18,45 @@
     <p>Start the demo server with <code>morbo -l 'http://*:3003' t/server/plugin.pl</code> and open <a href="http://localhost:3003/demo/plugin-server.html"><code>this website</code></a>.</p>
 
     <header>
-      <form id="searchform" autocomplete="off" action="/kalamar"></form>
+      <form autocomplete="off" action="/kalamar" id="searchform">      
+	<div id="searchbar">
+	  <input type="search"
+		 placeholder="Find ..."
+		 name="q"
+		 id="q-field"
+		 value="abcdefghijklmnopqrstuvwxyz"
+		 autofocus="autofocus" />
+	  <button id="qsubmit" type="submit"><span>Go</span></button>
+	  <!-- <i class="fa fa-arrow-circle-down show-hint" onclick="hint.popUp()"></i> -->
+	</div>
+
+        <!-- Search in the following virtual corpus -->
+        <div id="vc-view"></div>
+        in
+        <input id="show" name="show" type="hidden" />
+        <!--<input id="collection-name" name="collection-name" type="hidden"> -->
+        <input id="cq" name="cq" type="text" value="">
+	with <span class="menu select">
+	  <select name="ql" id="ql-field">
+	    <option value="poliqarp">Poliqarp</option>
+	    <option value="cosmas2">Cosmas II</option>
+	    <option value="annis">Annis</option>
+	    <option value="cql">CQL v1.2</option>
+	  </select>
+	</span>
+	<div class="button right">
+	  <input type="checkbox"
+		 value="1"
+		 name="cutoff"
+		 class="checkbox"
+		 id="q-cutoff-field" />
+	  <label for="q-cutoff-field"><span id="glimpse"></span>Glimpse</label>
+
+	  <!-- Todo: open tutorial - like openTutorial() -->
+	  <a href="doc/faq" tabindex="-1" class="question"><span>Question</span></a>
+	  <a href="tutorial.html" title="Tutorial" class="tutorial" id="view-tutorial"><span>Tutorial</span></a>
+	</div>
+      </form>
     </header>
     
     <main>