Code 1:
$(‘#row DIV’).mouseover(function(){
$(‘#row DIV’).addClass(‘testing’);
});
Code 2:
$(‘.row div’).mouseover(function(){
$(this).addClass(‘testing’);
});
The hash (#) specifies to select elements by their ID’s
The dot (.) specifies to select elements by their classname
$(‘.row’) will select any element with class=”row”
$(‘#row’) will select the element with id=row