Here, only jquery is used: http://owu.myaiesec.ro/index.php?id=43
Here, we also have prototype and scriptaculous http://owu.myaiesec.ro/index.php?id=41 You wont see any error in Firefox. You'll see errors in IE. But no jquery code is correctly executed (or is not executed at all) What i have found is that the jquery object itself is different on the prototype page. And i find that weird. //no prototype jQuery('div') returns a collection of objects //with prototype jQuery('div') returns the jQuery objects which has the same collection of elements in its first "slot" the $ correctly goes to prototype. jQuery only uses jQuery... but it seems that prototype is changing more stuff along the way. Any ideea on what is going on here? I would love not to have prototype at all, but the issue here is that prototype and jquery should be able to live togheter, And i have used them togheter on numerous occasions. If anyone has stumbled upon this issue, or is able to guide me further, please do so :)