Bounce Back Script

Need a script for inside a web page, that executes WHEN/AS THE PAGE LOADS - it will IMMEDIATELY send the user back to the last page INSTEAD of displaying the page that has the script, IF the previous page was one in a list of pages. OR, if the previous page was in a specific domain path, such as ANY page from the directory: [login to view URL] In other words: a script for Page "Z" that, WHEN "Z" LOADS, checks where the user is coming from. It compares their previous page path (where they are coming "from") against a list of pages OR a domain path like "[login to view URL]" IF the user is coming from a page on the list, OR from a page on the domain path (example: "[login to view URL]" is a BAD source) He is sent BACK to that previous page, immediately (instead of displaying the rest of page "Z"). IF the page he is coming from is NOT on the list, Or NOT from the domain path, the page "Z" is displayed normally. Javascript or php should be used. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform IE 6+ AND Netscape 4.x+ windows AND NT web sites