function move_in(img_name, img_src) { document[img_name].src = img_src; }
function move_out(img_name, img_src) { document[img_name].src = img_src; }

function newWinPortrait(url) {
    NewWindow = window.open(url, 'picture_popup', "toolbar=no,location=no,status=yes,menubar=no,scrollbars=0,resizable=no,width=500,height=660,top=0'left=0");
    NewWindow.focus();
}

function newWinLandscape(url) {
    NewWindow = window.open(url, 'picture_popup', "toolbar=no,location=no,status=yes,menubar=no,scrollbars=0,resizable=no,width=660,height=500,top=0'left=0");
    NewWindow.focus();
}