Provide the ability to get the nav item width of text.

base.css

@@ -7,6 +7,14 @@ Under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internati
     padding: 0;
     box-sizing: border-box;
 }
+#st{
+    position: absolute;
+    left: -1080px;
+    top: -1080px;
+    font-size: 1em;
+    visibility: hidden;
+    white-space: nowrap;
+}
 main{
 	padding-top: 70px;
 	padding-left: 6px;
@@ -122,6 +130,8 @@ main{
 }
 .menu a, .vmenu a{
     display: block;
+}
+.menu a, .vmenu a, #st{
     padding: 24px 16px;
 }
 .vmenu li{
@@ -321,9 +331,6 @@ main{
         float: right;
         width: auto;
     }
-    .vnav{
-        display: none;
-    }
     .menu li{
         float: left;
     }

index.go.html

@@ -195,5 +195,6 @@
         <img src="https://mirrors.creativecommons.org/presskit/buttons/80x15/png/by-nc-nd.png" alt="License" height="16"></a>.
 	</p>
 </footer>
+<div id="st"></div>
 </body>
 </html>

index.js

@@ -290,4 +290,14 @@ function SortDurationD(a, b) {
     } else {
         return  1
     }
+}
+function GetNavTextWidth(s) {
+    var st = document.getElementById("st");
+    if (st) {
+        st.textContent = s
+        var trw = st.clientWidth;
+        st.textContent = ""
+        return trw;
+    }
+    return 8 * s.length + 32
 }