hide div when clicking outside the container with jquery

I want to hide a div when they click out of it. For that I have this code that works perfectly:

var box3=$(".despcnt");
box3.mouseup(function () {
    return false;
});

$(this).mouseup(function (a) {
    if(!($(a.target).parent(".despcnt").length>0)){
        box3.removeClass("dino");box3.hide()
    }

});

But I want to exclude from the class. Despcnt a link that has the class desplcnt so when clicking outside the den or closes that same link ... not tried putting it did not work.

Any idea?

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