This can be done in validate(), see http://wiki.g2.bx.psu.edu/Admin/Tools/Custom%20Code Alex From: galaxy-dev-bounces@lists.bx.psu.edu [mailto:galaxy-dev-bounces@lists.bx.psu.edu] On Behalf Of Lukasse, Pieter Sent: Tuesday, 23 October 2012 9:05 PM To: galaxy-dev@lists.bx.psu.edu Subject: [galaxy-dev] Validation / validator questions Hi, Is it possible to do validation of input fields depending on the value of OTHER input fields? Example 1 If field A is filled, then field B also should be filled. Example 2 Field B should be > field A etc Pieter Lukasse Wageningen UR, Plant Research International Departments of Bioscience and Bioinformatics Wageningen Campus, Building 107, Droevendaalsesteeg 1, 6708 PB, Wageningen, the Netherlands +31-317480891; skype: pieter.lukasse.wur http://www.pri.wur.nl<http://www.pri.wur.nl/>