jQuery validation plugin question

I have a web form that is using this awesome plugin and I'm trying to set up a rule. In my form, I have a Quantity field. If the Quantity field is set to 1 AND a checkbox is checked, then I want to validate a field. My form is setup like: Quantity TEXTBOX id = txtQuantity Gift? CHECKBOX id = #other Recipient TEXTBOX id = txtRecipient and my jQuery code is: txtQuantity: "required", txtRecipientEmail: { required: "#other:checked" }, I tried: txtRecipientEmail: { required: "#other:checked", required: "$('txtQuantity').val() == '1'" } but that's not working Is there another way to do this?

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