How do I automatically stack divs vertically inside a parent?

Question

Here\'s what I am trying to accomplish...

1. \"parent\" has position:relative
2. \"div 1-3\" have position:absolute

However, whenever I do this,

Answer 1

In css file use...

div
{
    display : block;
}

Which will give a break line for each div block and that feature is by default and don't use relative - absolute technique.