function index_map( root_path )
 { 
  

  document.write(' <table border="0" align="center" cellspacing="0" cellpadding="0" vspace="0"> ');
  document.write('   <tr> ');
  document.write('     <td align="center"> <font size="2">  ');
  document.write('      ( <a href=  "' + root_path + 'index.html"                                          ACCESSKEY="i" title="Main site page"               >index</a> ) ');
  document.write('      [ <a href=  "' + root_path + 'coding/coding_index.html"                            ACCESSKEY="c" title="Programing awk/cpp/lex/yacc"  >coding</a> ]  ');
  document.write('      [ <a href=  "' + root_path + 'graph/graph_index.html"                              ACCESSKEY="g" title="Ray tracing, OpenGl"          >graph</a> ]  ');
  document.write('      [ <a href=  "' + root_path + 'misc/links.html"                                     ACCESSKEY="m" title="Miscelenious links"           >links</a> ]  ');
  document.write('      [ <a href=  "' + root_path + 'math/math_index.html"                                ACCESSKEY="t" title="Math"                         >math</a> ]  ');
  document.write('      [ <a href=  "' + root_path + 'web/web_index.html"                                  ACCESSKEY="w" title="Html tutorial, etc."          >web</a> ]  ');
  document.write('      [ <a href=  "mailto:' + e_mail__email + '@ddmrm.com?Subject=' + e_mail__subject + '"     ACCESSKEY="m"                                      >' + e_mail__email + '@ddmrm.com</a>  ]  ');
  document.write('     </font> </td> ');
  document.write('   </tr> ');
  document.write(' </table>  ');
 }