Syntax
document.links[num].protocol
The protocol property contains the protocol (http:, file:, ftp:, and so on) specified in the URL, including the ending colon (:). This property is a read/write string.
<html> <map name="colorMap"> <area name="greenArea" coords="1,1,48,48" href="http://www.navioo.com" target="_top"> </map> <img src="http://www.navioo.com/style/logo.png" align="top" height="100" width="100" usemap="#colorMap"> <script> <!-- document.write("protocol = ",document.links[0].protocol); --> </script> </html>