i have  created a webpage ,   like kind of application form,      i have added this link in a 2 different web pages,  from any of the website by clicking on that link tag they will redirect to our application form,

onclick of child application logo

here the problem , in header logo if anyone click on that we usually will refresh the page or redirect to home,  but here i have 2 parent pages(2 home pages), so if someone clickon applictaiontitle or logo of our child application how to redirect to actual parent website which we came from (like kind of broswer back button functionality required)

suggest me