contenteditable example

HTML

<p class="source" contenteditable="true">edit me</p>

<div id="target">edit them</div>

JavaScript

(function(){
var $target=$('#target'),
    $source=$('.source'),
    prev_value;
    $source.on('focus', function () {
       prev_value = $(this).html();
    });
    $source.on('blur', function () {
        alert($(this).html() === prev_value);             
    }); 
})()