function open_picture(){
    var height = 489;
    var width = 400;

    p_f= getElement('div-picture-fullscreen')
    p_f.style.display = 'block'
    p_b= getElement('div-picture-border')
    p_b.style.height = height
    p_b.style.width = width
    p_b.style.left =Math.round( (document.body.clientWidth - width) / 2 );
    p_b.style.top =Math.round( (document.body.clientHeight - height) / 2 );
    p_b.style.display = 'block'
}

function close_picture(){
    p_f= getElement('div-picture-fullscreen')
    p_f.style.display = 'none'
    p_b= getElement('div-picture-border')
    p_b.style.display = 'none'
 
}