Thanks a lot! that may solve most of the batch check problems
Still want to know if there are any effective method for larger scale domain name search
"Speed" is the factor I consider most
For .com and .net -> namebright.com/BulkSearch (up to 5000 domains in 1 search)
For others extensions -> name.com/names (domains must be with extension for example: name.info x 2000)