[jQuery] $ajax() question

[jQuery] $ajax() question


$.ajax({
type: "POST",
url: "mywebpage.aspx?
Arg="+args2,
contentType: "text",
data:"{}",
dataType: "text",
success: CompleteInsert,
error: onFail
});
I dont know why the onFail function is going to be executed when args2
is too big.
args2 is a string type
can anyone explain this
thanks