html element content change event

i need to known event of content change my div element, how can i do it with jquery?

<div id="mydiv">text before</div>

after some time

<div id="mydiv>other content</div>

i do such way

$开发者_如何学JAVA("#mydiv").change(function() { alert('yes'); });

by doesn't work

    (function(){

            var interval;

        jQuery.event.special.contentchange = {
            setup: function(data, namespaces) {
                    var $this = $(this);
                var $originalContent = $this.text();
                interval = setInterval(function(){
                    if($originalContent != $this.text()) {
                            console.log('content changed');
                            $originalContent = $this.text();
                            jQuery.event.special.contentchange.handler();
                    }
                },500);
            },
            teardown: function(namespaces){
                clearInterval(interval);
            },
            handler: function(namespaces) {
                jQuery.event.handle.apply(this, arguments)
            }
        };

    })();

$("#mydiv").bind("contentchange", function() {
   alert('yes'); ///no alert! why?
});

but i see logs in console!

You could trigger a custom event after you change the content of the element:

var $mydiv = $("#mydiv"); 

// set up the custom event handler
$mydiv.bind("contentchange", function() {
    alert("changed");
});

// change the content and trigger a custom event
$mydiv.html("other content").trigger("contentchange");

// and again
$mydiv.html("yet other content").trigger("contentchange");

"The change event is sent to an element when its value changes. 

This event is limited to <input> elements, <textarea> boxes and <select> elements. "

You cannot use the change event on divs.