jquery droppable accept

Question

Can anyone tell me how I can write a function in accept condition and then how does it finds out that what to accept and what not to accept. For example, I want to accept

Answer 1

Instead of using a class as accept, you can just use a function like and return true if it matches your criteria

$('#mydroppable').droppable(
{
    accept: function() { return true; },
    drop: function () { alert("Dropped!"); }
});