Roman Numerals using and not using OOJS

roman_numerals.js

function toRoman(n) {
    var r = '',
        decimals = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1],
        roman = ['M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I'];
    for (var i = 0; i < decimals.length; i++) {
        while (n >= decimals[i]) {
            r += roman[i];
            n -= decimals[i];
        }
    }
    return r;
}

// This is a much more elegant solution that another person posted on Stack Exchange-Code Review

roman_numerals_oo.js

var romanArray = [];
var toRoman = {

	analyze: function(number){
		romanArray = [];
		if (number >= 1000) {
			return this.thousands(number);
		}else if (number >= 100){
			return this.hundreds(number);
		}else if (number >= 10) {
			return this.tens(number);
		}else{
			return this.last_number(number);
		}
	},

	base_function: function (number, four, nine, five, one){
    if (number === 4){
        romanArray.push(four);
    }else if(number === 9){
        romanArray.push(nine);
    }else if(number >= 5 && number < 9){
        romanArray.push(five);
        var remainder = number % 5;
        for(var i = 0; i < remainder; i++) {
            romanArray.push(one);
        }
    }else if (number > 0 && number < 4){
        for(var e = 0; e < number; e++) {
            romanArray.push(one);
        }
    }else{

    }
    return romanArray;
	},

	thousands: function(number){
		var remainder = number % 1000;
		var thousands = Math.floor(number / 1000);
		for(var e = 0; e < thousands; e++) {
			romanArray.push('M');
		}
		return this.hundreds(remainder);
	},

	hundreds: function(number) {
    this.base_function(Math.floor(number / 100), 'CD', 'CM', 'D', 'C');
    return this.tens(number % 100);
	},

	tens: function(number){
		this.base_function(Math.floor(number/10), 'XL', 'XC', 'L', 'X');
		return this.last_number(number % 10);
	},

	last_number: function (number){
		this.base_function(number, 'IV', 'IX', 'V', 'I');
		return romanArray.join('');
	}
};

console.log(toRoman.analyze(8));
console.log(toRoman.analyze(299));
console.log(toRoman.analyze(2361));