什么时候以及如何调用寻找页面滚动动作的javascript函数？

Question

I have written a code to look for page scrolling. It works when I put it inside script tag. How to put this code inside a function and let it look for page scrolls?

Here is my code

$(window).scroll(function(){
                if  ($(window).scrollTop() == $(document).height() - $(window).height()){
                    alert('scrolling');
                }
}); 

Answer 1

I did not understand exactly what you ask,something like this ? (put this in a script tag or an external js file)

$(document).ready(function() {

    $(window).scroll(function(e){
         detect_scrollPage(e);
    });

});

function detect_scrollPage(event){
   ...
} 

Answer 2

What about this:

function scrollBinder(selector, callback){
    $(selector).scroll(function(e){
         callback.call(this, e);
    });
}

$(document).ready(function() {

    scrollBinder('#some_div', function(div, event) {
        //do calcl here
    })

    //or on window
    scrollBinder(window, function(div, event) {
        //do calcl here
    })

});

Any way it is a shorthand, most people will do that the same as you did.