var d = document;

// открываем для просмотра картинки
function openThumb(theURL,winName,features) {
        var ScreenWidth=window.screen.width;
        var ScreenHeight=window.screen.height;
        placementx=(ScreenWidth/2)-((780)/2);
        placementy=(ScreenHeight/2)-((580)/2);
        window.open(theURL,winName,features+",left="+placementx+",top="+placementy+",screenX="+placementx+",screenY="+placementy);
        return false;
}