This is my situation: I'm triying to create an autocomplete function with javascript or jquery in the contact's page layout. The idea is to autocomplete the post code and state according to what suburb the users types in. This can be done calling an external API (in my case, the Australian postal office) to retrieve the location of a suburb.
My problem is that I've read different ways to achieve autocomplete functions in custom visualforce page but not in a standard layout. These are some examples of how to do it in standard pages:
https://jungleeforce.wordpress.com/2013/05/05/using-jquerys-autocomplete-in-salesforce-part-1/
https://jungleeforce.wordpress.com/2013/05/05/using-jquerys-autocomplete-in-salesforce-part-2/
Does anyone know something about this? or is there a restriction from salesforce to execute javascript/jquery functions in a standard layout?
Thanks in advance for any help.