function resizeQuadro(){
    var total = document.getElementsByTagName( 'img' ).length;
    
    for( i = 0; i < total; i ++ ){
        if( document.getElementsByTagName( 'img' )[i].className == 'thumbsF' ){
            document.getElementsByTagName( 'img' )[i].style.marginTop = 50 - ( document.getElementsByTagName( 'img' )[i].height / 2 ) + 'px';
        }
    }
}