What\'s the difference between these two jQuery statements? They seem to do the same thing by getting all the children div tags.
$(\"#mainblock div\")
Have a look at jQuery Selectors
Child Selector ("parent > child") - Hierarchy Selects all direct child elements specified by "child" of elements specified by "parent".
Descendant Selector ("ancestor descendant")- Hierarchy Selects all elements that are descendants of a given ancestor.