revised search form to not be an actual form

Src/VideoGameQuotes.Api/Search/Lucene/LuceneQuoteSearcher.cs

@@ -26,6 +26,10 @@ namespace VideoGameQuotes.Api.Search.Lucene {
 
 		[UnitOfWork]
 		public IEnumerable<SearchResult> Search(string searchString) {
+			if (string.IsNullOrWhiteSpace(searchString)) {
+				return Enumerable.Empty<SearchResult>();
+			}
+
 			var query = queryParser.Parse(QueryParser.Escape(searchString));
 			var searcher = new IndexSearcher(indexLocator.IndexDirectory);
 			return searcher

Src/VideoGameQuotes.Web/Views/Shared/Site.Master

@@ -29,12 +29,8 @@
 							<li><%= Html.ActionLink("Submit", "submit", "Quote", null, new { title = "Submit a new quote" }) %></li>
 							<li><%= Html.ActionLink("About", "about", "Home", null, new { title = "About the site" })%></li>
 							<li class="searchbox">
-								<% using (Html.BeginForm("search", "quote", FormMethod.Get, new { id = "search-form" })) { %>
-									<div>
-										<%= Html.TextBox("searchQuery", null, new { id = "search-query" })%>
-										<input type="image" src="/media/images/search.png" alt="search" title="search quotes, games, systems" />
-									</div>
-								<% } %>
+								<%= Html.TextBox("searchQuery", null, new { id = "search-query" })%>
+								<img src="/media/images/search.png" alt="search" title="search quotes" id="search-submit" />
 							</li>
 						</ul>
 					</div>

Src/VideoGameQuotes.Web/media/css/global.css

@@ -129,6 +129,10 @@ ul.menu li {
 	padding: 5px;
 }
 
+#search-submit {
+	cursor: pointer;
+}
+
 #header {
 	background-color: #669966;
 }

Src/VideoGameQuotes.Web/media/js/vgquotes.js

@@ -7,14 +7,24 @@
 	}
 
 	$(document).ready(function() {
-		$("#search-form").submit(function() {
-			var searchQuery = $.trim($("#search-query").val());
-			if (searchQuery.length > 0) {
-				window.location = "/search/" + searchQuery;
-			}
+		(function(){
+			var submitSearch = function() {
+				var searchQuery = $.trim($("#search-query").val());
+				if (searchQuery.length > 0) {
+					window.location = "/search/" + searchQuery;
+				}
 
-			return false;
-		});
+				return false;
+			};
+
+			$("#search-query").keypress(function(e) {
+				if (e.which === 13) {
+					submitSearch();
+				}
+			});
+
+			$("#search-submit").click(submitSearch);
+		}());
 
 		var getQuoteId = function($container) {
 			return $container.find("input.quote-id").val();