<SCRIPT LANGUAGE="JavaScript">
function hyperlinks(target)
{
  if (target)
    where = "_blank";
  else
    where = "_self";
  for (var i=0; i<=(document.links.length-1); i++)
  {
    document.links[i].target = where;
  }
}
</SCRIPT>

<FORM><INPUT TYPE="checkbox" NAME="targetnew" ONCLICK="hyperlinks(this.checked)"> Open links in new Window</FORM>