function formatSize(v, c) {
v = parseInt(v, 10);
for(c = 0; v > 1024; c++) v = (v / 1024).toFixed(2);
return v + ' ' + ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'][c]
}
P.S.: This function converts size in bytes to a human readable format.