Thank you Tony.

here is a sample, not very obvously.

I initial the grid with gridstate 'hidden'.

Only special is, I clicked the header twice then the grid was collapsed, but it should collapse at the first time I click it.

Thanks Tony,

Here is an example :http://www.cs.ccu.edu.tw/~hhc91u/workspace/Example.htm

The proplem happend when there are two grid in one page, and the second loaded grid would have the problem I mentioned.

The two grid in my example have the same table definition and navigator option, but no matter if they have the same or different definition, the problem would still happen.

ooops… I can't change the id… actually I don't even know where it is..