/////////////////////////////////
// File Name: mBanner.js       //
// By: Manish Kumar Namdeo     //
/////////////////////////////////

// BANNER OBJECT
function Banner(objName){
	this.obj = objName;
	this.aNodes = [];
	this.currentBanner = 0;
	
};

// ADD NEW BANNER
Banner.prototype.add = function(bannerContent) {
	this.aNodes[this.aNodes.length] = new Node(this.obj +"_"+ this.aNodes.length, bannerContent);
};

// Node object
function Node(name, bannerContent) {
	this.name = name;
	this.bannerContent = bannerContent;
};

// Outputs the banner to the page
Banner.prototype.toString = function() {
	var str = ""
	for (var iCtr=0; iCtr < this.aNodes.length; iCtr++){
		str = str + '<span ';
		str = str + 'id="'+this.aNodes[iCtr].name+'" ';
		str = str + 'class="m_banner_hide"';
		str = str + '>';
		str = str + ''+this.aNodes[iCtr].bannerContent+'';
		str += '</span>';
	}
	return str;
};

// START THE BANNER ROTATION
Banner.prototype.start = function(){
	this.changeBanner();
	var thisBannerObj = this.obj;
	setTimeout(thisBannerObj+".start()", 5000); // 5000 milliseconds rotation
}

// CHANGE BANNER
Banner.prototype.changeBanner = function(){
	var thisBanner;
	var prevBanner = -1;
	if (this.currentBanner < this.aNodes.length ){
		thisBanner = this.currentBanner;
		if (this.aNodes.length > 1){
			if ( thisBanner > 0 ){
				prevBanner = thisBanner - 1;
			}else{
				prevBanner = this.aNodes.length-1;
			}
		}
		if (this.currentBanner < this.aNodes.length - 1){
			this.currentBanner = this.currentBanner + 1;
		}else{
			this.currentBanner = 0;
		}
	}
	

	if (prevBanner >= 0){
		document.getElementById(this.aNodes[prevBanner].name).className = "m_banner_hide";
	}
	document.getElementById(this.aNodes[thisBanner].name).className = "m_banner_show";
}