w2v-server: show dialog if word not found
diff --git a/templates/index.html.ep b/templates/index.html.ep
index cdca76b..72066ed 100644
--- a/templates/index.html.ep
+++ b/templates/index.html.ep
@@ -38,6 +38,7 @@
 
 				 $(".selector").tabs({ active: 1 });
 
+
 				 $('#firsttable').DataTable({
 						 "sScrollY": "780px",
 						 "bScrollCollapse": true,
@@ -736,9 +737,30 @@
 							</script>
             % } else {
 							<div id="wrapper">
-								<p>
-									ERROR: "<%= $word %>" not found in vocabluary.
-								</p>
+								<div id="not-found-dialog" title="Not found">
+									<p>ERROR: "<%= $word %>" not found in vocabluary.</p>
+									<p>If you are sure you have spelled the word as intended, you can try to increase the cutoff parameter in the options menu.</p>
+								</div>
+								<script>
+								 $( function() {
+										 $( "#not-found-dialog" ).dialog({
+												 autoOpen: true,
+												 modal: true,
+												 draggable: false,
+												 height: "auto",
+												 width: "auto",
+												 resizable: false,
+												 buttons: {
+														 "OK": function() {
+																 $( this ).dialog( "close" );
+														 },
+														 "Apply": function() {
+																 window.open($(location).attr('pathname')+'?'+$('form').serialize(), "_self");
+														 }
+												 }
+										 });
+								 });
+								</script>
 							</div>
 						% }
 						<div id="second">