function openwin(href) { 
   width = 800;
   height = 470;
   F1= window.open("/docs/picture_big.php?path="+href,"popupwindow","top=100, left=150, width="+width+", height=" + height + ", resizable=yes, scrollbars=no");
}

function openwindow(href,width,height) { 
   F1= window.open(href,"popupwindow","top=50, left=50, width="+width+", height=" + height + ", resizable=yes, scrollbars=yes");
}