function mOpen(image_url, width, height) {
var ajmo = window.open(image_url, 'popup_win', 'width='+width+',height='+height+',top='+(screen.height/2-(height/2))+',left='+(screen.width/2-(width/2)));
ajmo.document.write('\n\nPreview\n\n');
ajmo.document.write('\n
\n\n');
ajmo.document.write('\n');
ajmo.document.close();
}