Where is the Java Script for this?

Hello

For tool tip and dynamic resizung, Niall has suggested me the below link,

https://acrobat.com/#d=jD3k1sL7PGcTo6CHHTiEOA

but, i did not see its associated code, pls. let me know How can figure out its attached Java Script so that i will use it as a code snippet for my own development

Regarding the TOOL TIP: Pls. note that, my drop-down entries/values are DYNAMIC, my_form does not know UNTIL runtime, i mean, i am not specifying the values/entries at my_form level, am passing them from back end/data source/SAP software

Thank you