Greetings!!
Yes, I am well experienced Magento developer have been working on Magento 1.9 from last 5+ years and surely can help you in fixing pop-up problem Magento 1.9 permanently.
**Can you please share the existing website details so I can review?
Have a look a some of my recent work in Magento 1.9:
**Highly skilled in HTML, JavaScript, PHP, E-commerce, Magneto 1.9, Magneto fixing, Magento extensions, customs modules development.
I am ready to start right away and available for further discussion.
Looking forward to hearing from you soon.
Regards.