Prova con:
codice:
<form name="form1" method="post" action="#" onsubmit="java script:elargeimage('DIRECTIONS','/images/imageshome/directionslow3.jpg','815','495'); return false;">
              [img]images/imageshome/icon_info.gif[/img]                   
              <input type="submit" name="Submit" value="D I R E C T I O N S" style="font-size: 9pt; color: #0000FF; font-weight: bold; font-variant:normal; height:30px;" >
            </form>