Thank both of you for the reply!
Is there any dependency to induce the addon to work that I made at
http://addon.ziuo.net ? Because it seems not working. It reports wrong command for bot /rinv and /raidinvite
All I have to do is copy-paste the code (with the starting line "local WAIT_TIME = 10") to the "LUA file" editbox on addon.ziuo.net and choose a name above at "Addon folder name" editbox or should I use "Show advanced TOC options" also or something else I missed out? How can I get it to work?