Adding [X] "Remove" button to an input
In this example we'll use some CSS magic and DOM manipulation to achieve the following layout. You might think this is easy to do with native layouts in ExtJS4, but I've found otherwise.
Adding [+] "Add" button to fieldset
In this example we'll use some CSS magic to put a button in the upper right corner of the fieldset. The button will be a child of our fieldset, so that when you collapse/expand the fieldset, the button behaves appropriately.
Basic Textfield Input Layout
In this example we put together the following layout that correctly grows vertically, as fields/errors are added: