hover_replaceTitlesByTags('img,span,a', "'trail', true   ,'fade', 'both',   'fadeMax', 100");

var hover = {
'span.hover1' : function(element) {
 element.onmouseover = function(event) {
  domTT_activate(this, event,   'content', '<img src=http://img.allqoo.com/images/26ss3.png>',   'trail', true   ,'fade', 'both',   'fadeMax', 100  );
 }
}
,'span.hover2' : function(element) {
 element.onmouseover = function(event) {
  domTT_activate(this, event,   'content', '<img src=http://img.allqoo.com/images/29photo2_datacenter.jpg>',   'trail', true   ,'fade', 'both',   'fadeMax', 100  );
 }
}
};

Behaviour.register(hover);