css - displacement of a single HTML element at the opening of another -

look @ problem:

how make when open popup window footer shifted down?

some css here:

#advanced_search_div_body { height: 100%; width: 817; margin: 0 auto; padding: 0; display: table; background-color: white; }  #foot { padding: 30px 0px; background-color: black; clear: both; position: relative; bottom: 0; width: 100%; overflow: hidden; z-index: 2;  } 

probably need tell footer down of page.

so, change #foot position: relative absolute. try this:

position:absolute; width:100%; bottom:0px; 

or like:

position:fixed; bottom:0; width:100%;