Dividing Funds in Joint Accounts/Child Abandonment

Your husband is wrong.  Until there's an actual court case, you both have equal rights to all the money in that account, unless there's an enforceable contract between you that says otherwise.

It's all too common, in fact, for someone to learn that their spouse wants a divorce by finding out that the joint account has been emptied out.  Courts tend not to do a whole lot about that directly, unless it leaves the other spouse unable to meet basic living expenses, in which case a temporary order deals with that.  As long as it's shown that the money hasn't been wasted, or hidden in someone else's name, it doesn't become a long-term problem;  proof of what the money was used for, legitimately (and that would include your moving costs, etc.), is a good thing to have.

Financial records, in general, are often critical in cases like this.  If you have access to any records about the accounts in his name, get copies;  store a full set of whatever records you have in a safe place.

Most courts will look at the assets (and debts) as of the date the divorce is filed.  The paper trail, once again, is very important.