JAVASCRIPT

jquery if element is clicked

$("#element").click(function(){
    var $this = $(this);
    if($this.data('clicked')) {
        func(some, other, parameters);
    }
    else {
        $this.data('clicked', true);
        func(some, parameter);
    }
});

jquery check if clicked inside div

$(function() {
  $("body").click(function(e) {
    if (e.target.id == "myDiv" || $(e.target).parents("#myDiv").length) {
      alert("Inside div");
    } else {
      alert("Outside div");
    }
  });
})