...thefunction(){...xmlhttp...}...
...<a href=# onclick="javascript:thefunction()">test</a>...
...<form name="theform" method="post" target=_blank action="jump.php">...
...<a href=# onclick="javascript:thefunction()">test</a>...
...<form name="theform" method="post" target=_blank action="jump.php">...
onsubmit="window.open('','win','')" action="jump.php" target="win"