Script to mask URL

Is there a script maybe that allows you to mask the URL. I bought a domain and it redirect to a free hosted page. So, you type in www.mysite.com and it redirects and says www.members.theirsite.com/mysite. I can't actually get my domain to point here without a redirect, because the settings wont allow subfolders (i.e. it would work if my free space address was mysite.members.theirsite.com but not members.theirsite.com/mysite.) What is the best way to fix this so my users always see mysite.com? I know basics but I can figure out some higher stuff, but please keep it simple if you can. Thanks

re: Script to mask URL

i don't believe it could be done =\

re: Script to mask URL

may be you could use a frameset ... and don't redirect, load the content from your free host but load it into a frame that comes from your 'mysite'-domain. but with such a solution you may encounter problems with cross-site-scripting issues (ajax/etc.) but since your sources are under you control you could find workarounds for that ...