How do I make Paypal Standard load in a new window?

[color=#282828][font=arial, verdana, tahoma, sans-serif]Hi! This question was probably asked before but I searched around and couldn’t find the answer. Was testing with the paypal checkout inside an iframe, and I’ve read that paypal standard does not allow to be used inside an iframe. How do I make the checkout open a new window to load the paypal payment page? thanks! [/font][/color]