ASP.NET(with master page) How to get two ID in one time in jQuery

[play3kill3r]

I have little problem, maybe somebody knows solution??? Usually to get two ID using jQuery I do like this:\[code\]$('#firstID, #secondID').datepicker({ ...\[/code\]How i can do that using jQuery in ASP.NET (with MasterPage)??? I tried this: \[code\]$('[id$=firstID], [id$=secondID]').datepicker({ ...\[/code\]It work, but not very well((( Thanks advance!!!