<script language="javascript">

function RandomHTMLLong(args,delim)
{
/* si: start index     
** i: current index
** ei: end index
** cc: current count
*/
     htmlSet = new Array();
     si = 0;     
     cc=0;
     ei = args.length;
      for (i=1;i<ei;i++) {
        if (args.charAt(i) == delim) {
          htmlSet[cc] = args.substring(si,i);
          cc++;
          si=i+1;
          }
        }
      ind = Math.floor(Math.random() *cc);

      document.write(htmlSet[ind]);
}

function RandomHTML(args)
{
      RandomHTMLLong(args,',');
}

</SCRIPT>

<script>
RandomHTMLLong('Код1,Код2,Код3,Код4,',',');
</SCRIPT>