function generate_address(username, hostname, hosttype, linkyn){
	// username = all before atsign
	// hostname = from atsign until last period
	// hosttype = from last period until end
      // linkyn = y or n - yes if create mail to link, r to just return value in fuction
	var atsign="@";
      var addr = username + atsign + hostname + "." + hosttype;
      if (linkyn =="y" ||linkyn =="Y"){
	  document.write("<" + "a"+" " + "href=" + "mail" + "to:" + addr + ">" + addr+ "<\/a>");
      }else  if (linkyn =="r" ||linkyn =="R"){
        return (addr);
      }else{
        document.write(addr);
      } 
}