to post messages and comments.

var arr = $$('#statistics tr td')
var i;

for(i=5; i<arr.length; i+=5){
arr[i+1].innerHTML = parseFloat(arr[i+1].innerHTML)*2
arr[i+2].innerHTML = parseFloat(arr[i+2].innerHTML)*2
arr[i+3].innerHTML = parseFloat(arr[i+3].innerHTML)*2
arr[i+4].innerHTML = parseFloat(arr[i+4].innerHTML.replace('МБ',''))*2+' МБ'
}