using javascript in wcf, Which i choose LINQ method that method calls repeatedly What can i do?

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C#

ASP.NET

WCF

LINQ

Dear sir,

I cant understand error,
because when i call LINQ method from submit button in my asp.net page,
this method more than once calling(3 or 4 times called),
Finally Error message thrown.

Note:
all code is written in java Script (in source page ALONE, Not code behind side/not c# using)

Any one can known this problem

How to solve?Please way me

Thanks in Advance.
by mohan.KaInspire.