call javascript function from incoming URL - jquery colorbox

i am using colorbox ( [login to view URL] ) lightbox functionality powered by jquery. i am using it to show an overlay pop-up when a page loads. i am currently using a call via onload in the body tag. this works pretty good, but i can only have one pop-up choice per page. i would like the incoming URL to determine what pop-up gets shown at time of page load. ex: [login to view URL] loads pop-ups/[login to view URL] over [login to view URL] [login to view URL] loads pop-ups/[login to view URL] over [login to view URL] [login to view URL] loads pop-ups/[login to view URL] over [login to view URL] i have attached all files. [login to view URL] currently loads [login to view URL] via onload as pop-up. i have read that there are security concerns when you pass function calls via URLs, so please assure me your solution is secure. final deliverable will be a zip file with my files edited to perform as my example (ex.) above including informative code notations and list of files edited. must be a-grade browser functional ( [login to view URL] ).