Show MySQL databases size

Counting all databases size in MySQL - original posted here.

select table_schema "Database",
sum( data_length + index_length ) / 1024 / 1024 "Size (MB)",
sum( data_free )/ 1024 / 1024 "Free (MB)"
from information_schema.tables
group by table_schema;

Cross-browser printing iframe content

I found problem with printing iframe content in Opera. So here is my simple solution:

function print_iframe(s) {
 var iframe = window.frames[s];

 if(navigator.userAgent.indexOf("Opera") == -1) {
   iframe.focus();
   iframe.print();
 } else {
   var opera = window.open(iframe.location);
   opera.opener.focus();
   opera.print();
   opera.close();
   opera = null;
 }
}