where the HTML is:

<input type="range" class="fred1" min="0" max="100" name="sld7">

and the CSS is:

input[type=range].fred1::-ms-track {
     height:12px;
}
input[type=range].fred1::-ms-fill-lower { background-color:#3333aa; }
input[type=range].fred1::-ms-fill-upper { background-color:#9999dd; }
input[type=range].fred1::-ms-thumb {
   border:solid black 1px;
   background-color:white;
   border-radius:6px;
   width: 12px;
   height: 12px;
}