Problem Five

five.js

var test = 20,
    largest = 1,
    divisibleFlag;

for ( var t = 20; t > 0; t-- ) {
    largest = largest * t;
}

for ( var i = 20; i <= largest; i += 20 ) {

    divisibleFlag = false;
    
    for ( var j = 20; j > 1; j-- ) {
        
        if ( i % j !== 0 ) {
            divisibleFlag = false;
            break;
        }

        divisibleFlag = true;

    }

    if ( divisibleFlag ) {
        document.write( i );
        break;
    }

}