Just store the contents to a variable and check if it is different after blur()
event. If it is different, store the new contents.
var contents = $('.changeable').html();
$('.changeable').blur(function() {
if (contents!=$(this).html()){
alert('Handler for .change() called.');
contents = $(this).html();
}
});
example: http://jsfiddle.net/niklasvh/a4QNB/