resizable div draggable

1) When i resize a div, whole my page is automaticaly reorganize.

A simple exemple :

<div style="border: 1px solid;">

a

<div class="block">coucou</div>

b

<div class="block">coucou</div>

c

<div class="block">coucou</div>

d

</div>

2) when I resize a draggable div the lift (on the right) is outside the resizable area ...

Excuse my English