yet another cross-browser problem, and im not too good with javascript. take this: http://xoog.net/index.php?a=v&m=p&memid=3&iid=7043 When a user clicks on a picture, it should send them to a page with with the image co-ordinates they have clicked on (To create an 'imagetag' like 'vitaminp' on the bottom right). It works fine in IE and Opera, but Firefox isn't interested. The image tag has this: onClick='tagMe(this)' which executes: function tagMe(obj){ clickX = window.event.offsetX; clickY = window.event.offsetY; window.location="http://xoog.net/index.php?a=addTag&x="+clickX+"&y="+clickY+"&m=p&iid=7043"; } Code (markup): ... how to I make that cross-browser compatible? Thanks