Random Number Generator with speed control

by Jogesh Sharma

HTML

<h1 id="result"></h1>

CSS

/*
* http://webomnizz.com/blog/javascript/settimeout-random-interval-javascript/
*/

JavaScript

/*
 * @author Jogesh Sharma
 * @param {int} range (optional)
 * @returns {numGenrator}
 * 
 */

var numGenrator = function(element){
    this.element = document.getElementById(element);
};

numGenrator.prototype = {
    init: function(options){
        
        var that = this;
        
        that.tempRange = options.startRange == undefined ? 1000 : options.startRange;                
        that.range = that.readCookie('_jnum') == null ? that.tempRange : that.readCookie('_jnum');
        that.format = options.currencyFormat == undefined ? false : options.currencyFormat;
        
                
        // Default Value
        that.element.innerHTML = that.format == true ? this.currencyFormat( that.range ) : that.range;
        
        (function loop() {
            var rand = Math.round(Math.random() * (2000 - 200)) + 200;
            setTimeout(function() {
                    that.actionInit();
                    loop();  
            }, rand);
        }());
        
    }, 
    actionInit: function(){
        this.range++;
        
        // Use Cookie to Remmber
        // Last Value
        this.createCookie('_jnum', this.range, 20);
        
        this.element.innerHTML = this.format == true ? this.currencyFormat( this.range ) : this.range;
    }, 
    createCookie: function(name, value, days){
        if( days ){
            var date = new Date;
            date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
            var expire = "; expires=" + date.toGMTString();            
        } else {
            var expire = "";
        }
        
        document.cookie  = name + "=" + value + expire + "; path=/";
    }, 
    readCookie: function(name){
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
            var c = ca[i];
            while (c.charAt(0)==' ') c = c.substring(1,c.length);
            if (c.indexOf(nameEQ) == 0) return...