function generate_address( username, hostname, subject ) {
        var domain = ".org";
        var atsign = "@";
        var addr = username + atsign + hostname + domain;
		
		if (hostname == "yahoo") {
				domain = ".com"; 
				document.write( username + atsign + hostname + domain);
		}
		else if (hostname == "sbcglobal") {
				domain = ".net";
				document.write( username + atsign + hostname + domain);
		}
        else { document.write( 
          "<" + "a" + " " + "href=" + "mail" + "to:" + username + atsign + hostname + domain + "?subject=" + subject + ">" + addr + "<\/a>");
		}
      }