We are currently using FSM Technician portal from version 5.6.3 on which we were able to add custom validation logic (via .NET code), including highlighting specific fields or line to make it easier for our team to do their tasks. 

Wondering what options we have if we’ll use version 6U24 ? 
Client scripting functionality is not robust enough to accommodate complex logic we need. 

Is there a way to insert .NET code or JScript code in this version of Technician Portal?