when I type url (www.altavista.com) in a proxy it shows some thing like this http://www.proxysite.com/index.php?q=aHR0cDovL3d3dy5hbHRhdmlzdGEuY29t&hl=3ed how they convert www.altavista.com into a code like this Is there any function to covert a url into code like that?