<form name="form1" method="POST">

Select a page to visit:

<select name="dd1" size=1>

<option value="URL spre selectia 1">
Selectia 1
</option>

<option value="URL spre selectia 2">
Selectia 2
</option>

<option value="URL spre selectia 3">
Selectia 3
</option>

</select>

<input type="button"

 onClick=
  "location =
  document.form1.dd1.options
  [document.form1.dd1.selectedIndex].value;"

 value="GO">

</form>