Get reference url when redirected to a new window

Question

Hi,

 

Need to get the reference url when redirected to a new window using javascript.

 

My intention is to mask the redirected url so that users do not copy-paste the url independently.

 

so i need to check whether the url is redirected only from my webpage 

 

I've not used session variable since both are in different applications.

 

Any help is appreciated.

Thanks in advance