function popup(image_url, width, height) { var x = Math.round((screen.width - width) / 2); var y = Math.round((screen.height - height) / 2); popup_wnd = window.open( '', 'rs_image_popup', 'left=' + x + ',top=' + y + ',' + 'width=' + width + ',height=' + height + ',menubar=no,status=no,location=no' ); popup_wnd.document.write( '' + '

' ); }