How to get the sysid from url and gets its display value via client script

[surya123]

hi All

This is the url I have

https://www.myinstance.servicenow/u_tester.do?sysparm_document_key=b346c9c04f29d2006c29f5a18110c7ed

I want to write a on Load client script, which picks up this sysid's display value.

Can you please help me on how to achieve this?

Thanks

Surya

[surya123]

Thanks Anurag and Srini.