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  <title>Moja strona WWW</title>
  <script type="text/javascript">
    function zmieńTekst(id, tekst)
    {
      var pt = document.getElementById(id);
      pt.innerHTML = tekst;
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<body>
<p style="cursor:pointer;"
   id="pt1"
   onclick="location.href='http://helion.pl'"
   onmouseover="zmieńTekst('pt1', 'http://helion.pl')"
   onmouseout="zmieńTekst('pt1', 'Witryna helion.pl')"
>
Witryna helion.pl
</p>
<p style="cursor:pointer;"
   id="pt2"
   onclick="location.href='http://marcinlis.com'"
   onmouseover="zmieńTekst('pt2', 'http://marcinlis.com')"
   onmouseout="zmieńTekst('pt2', 'Witryna marcinlis.com')"
>
Witryna marcinlis.com
</p>
<p style="cursor:pointer;"
   id="pt3"
   onclick="location.href='http://onepress.pl'"
   onmouseover="zmieńTekst('pt3', 'http://onepress.pl')"
   onmouseout="zmieńTekst('pt3', 'Witryna onepress.pl')"
>
Witryna onepress.pl
</p>
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