Position div box at the end of after ensuing elements

Answer 1

If you control the dimensions of the divs and are sure that their contents will not break your layout,you could position them with css. A bit awkward, but something like:

#one, #two, #three {
   position: absolute;
   width: 200px;
   height: 200px;
}
#one {
   top: 400px;
}
#two {
   top: 0px;
}
#three {
   top: 200px;
}

These positions could then be changed with javascript if you need to.