asp.net - Auto log in to different domain without entering username and password

Question

I am in a system which developed by Java EE, the link is inside a jsp page, like in this jsp page i have <a href="http://www.differnet.com/a.aspx" target="_blank">Visit W3Schools</a>, need to log in to this aspx page in different domain without entering username and password. What should put in the target attribute?

Answer 1

In a different domain, pass username and password as query string and fetch this in the aspx page. In the page_load of aspx page, check the username and password with database and allow user accordingly.