how to turn off pop uo blockers in windows 7 phone

Pop-ups are getting deprecated and when someone chooses to implement it in their site they are simply shooting themselves in their own foot for not being Browser and Device Independent; really, W3 discourages it and provides alternatives. Thus, don't expect these on a mobile browser.

It's the developer that has to adjust; not you, the user that has to figure ways around standards. At best you could figure out the URL that is being opened in the pop-up on a computer, and open that URL on your mobile phone. But other than that, the site you're browsing is outdated and isn't made to support the mobile world...