Script Error when printing

I have created a project using RH9 that I added a "Print" button to (Thanks Rick!) .  The print function seems to work well in IE9 but when the customer trys to print from IE7 they are receiving the below error......

The following is the Java Script added to the Skin.......

javascript:parent.frames[1].bsscright.focus();window.print();

Unfortunately... the customer must use IE7 because it is part of a standard image provided by thier organization.

Appreciate any insight ......