fix navbar button for mobile tapping (turn to button instead of adding href=#), streamline less docs page

docs/javascript.html

@@ -34,11 +34,11 @@
     <div class="navbar navbar-fixed-top">
       <div class="navbar-inner">
         <div class="container">
-          <a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
+          <button type="button"class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
             <span class="icon-bar"></span>
             <span class="icon-bar"></span>
             <span class="icon-bar"></span>
-          </a>
+          </button>
           <a class="brand" href="./index.html">Bootstrap</a>
           <div class="nav-collapse collapse">
             <ul class="nav">