## Need help with Luhn algorithm check

I need to output 350 employee numbers with a Luhn number at the end of the string.
I found this site: http://imei.sms.eu.sk/ This is almost what I want, but with this code I only can implement one string at a time, so with 350 numbers it will take time. Do any one know how I can insert all the 350 employee numbers at once and get the Luhn number at the end of the string?

Code:
```Source code:

// Javascript code copyright 2009 by Fiach Reid : www.webtropy.com
// This code may be used freely, as long as this copyright notice is intact.
function Calculate(Luhn)
{
var sum = 0;
for (i=0; i<Luhn.length; i++ )
{
sum += parseInt(Luhn.substring(i,i+1));
}
var delta = new Array (0,1,2,3,4,-4,-3,-2,-1,0);
for (i=Luhn.length-1; i>=0; i-=2 )
{
var deltaIndex = parseInt(Luhn.substring(i,i+1));
var deltaValue = delta[deltaIndex];
sum += deltaValue;
}
var mod10 = sum &#37; 10;
mod10 = 10 - mod10;
if (mod10==10)
{
mod10=0;
}
return mod10;
}

function Validate(Luhn)
{
var LuhnDigit = parseInt(Luhn.substring(Luhn.length-1,Luhn.length));
var LuhnLess = Luhn.substring(0,Luhn.length-1);
if (Calculate(LuhnLess)==parseInt(LuhnDigit))
{
return true;
}
return false;
}```