text: ﻿<html>
  <head>
      <style>
          #TB_window
          {
              border: 1px solid red;
              position: fixed;
              top: 0;
              left: 0;
          }
          
          #TB_overlay {
              height: 200px;
              left: 10px;
              position: fixed;
              top: 80px;
              width: 200px;
              
              opacity: 0.1;
  
              background-color: green;
          }
      </style>
  </head>
  <body>
      SOME CONTENT
      <div id="TB_overlay">
      </div>
      <div id="TB_window"></div>
  
  </body>
  </html>
  