Why is .scrollTop(); not working well?

Question

I'm trying to make a sample alert if you scroll after a certain height, but the code does not work. Have a look:

$(window).scroll(function(e){
     var scrolled = $(window).scrollTop();
     if (scrolled = 18) {
        alert("ciao");
     }
});

The Google Chrome's console does not report me any bugs and jQuery is linked properly. Do you know which is the problem?

Answer 1

Your assignment operator = should be a comparison operator == .

if (scrolled == 18) {// ==
               alert("ciao");
}

Update:

Don't know why you want alert() at exactly 18 . But you should better use this:

if (scrolled >= 18) {// ==
               alert("ciao");
}