Largest product in a series

Problem 8.js

var adjacentDigits = 13;
var number = "7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450";
var currentHighest = 0;

// split into digits
var digits = number.split("");

// try every starting point
for(var i = 0; i < digits.length - adjacentDigits; i++)
{
    // multiply the numbers
    var product = digits[i];
    for(var j = 1; j < adjacentDigits; j++)
    {
        product = product * digits[i+j];
    }
    
    // is the new product the highest?
    if(product > currentHighest)
    {
        currentHighest = product;
        console.log("new highest is " + currentHighest);
    }
}