// js functions
//--------------------------------------------------------------------------//
function openPicture(url, width, height, title) {
 var left = (screen.availWidth - width) / 2;
 var top = (screen.availHeight - height) / 2;
 width = width +20;
 height = height + 20;
 var win = window.open(url,'picture_preview','location=no,status=no,toolbar=no,scrollbars=no,width='+width+',height='+height+',left='+left+',top='+top);
} 
//--------------------------------------------------------------------------//