/////////////////////////////////
// File Name: mBanner.js       //
// Version: 2                  //
// By: Manish Kumar Namdeo     //
/////////////////////////////////

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

};

// ADD NEW BANNER
Banner.prototype.add = function(bannerType, bannerPath, bannerDuration, height, width, hyperlink, loop) {
    this.aNodes[this.aNodes.length] = new Node(this.obj +"_"+ this.aNodes.length, bannerType, bannerPath, bannerDuration, height, width, hyperlink, loop);
};

// Node object
function Node(name, bannerType, bannerPath, bannerDuration, height, width, hyperlink, loop) {
    this.name = name;
    this.bannerType = bannerType;
    this.bannerPath = bannerPath;
    this.bannerDuration = bannerDuration;
    this.height = height
    this.width = width;
    this.hyperlink= hyperlink;
    this.loop = loop;
};

// Outputs the banner to the page
Banner.prototype.toString = function() {
    var str = "";
    var iBannerIndex = 0;
    if(this.changeOnRefresh == true){
        // Read the cookie
        var BannerName = this.obj;
        var lastBannerIndex = readCookie(BannerName);

        if(isNaN(lastBannerIndex) == true || lastBannerIndex == null){
            iBannerIndex = 0;
        }else if(lastBannerIndex == '' || parseInt(lastBannerIndex) >= this.aNodes.length - 1){
            iBannerIndex = 0;
        }else{
            iBannerIndex = parseInt(lastBannerIndex) + 1;
        }

        // Set the new value
        createCookie(BannerName,iBannerIndex,7);
    }

    for (var iCtr=0; iCtr < this.aNodes.length; iCtr++){
        if(this.changeOnRefresh == true && iBannerIndex != iCtr){
            continue;
        }
        str = str + '<span name="'+this.aNodes[iCtr].name+'" '
        str = str + 'id="'+this.aNodes[iCtr].name+'" ';
        if(this.changeOnRefresh == true && iBannerIndex == iCtr){
            str = str + 'class="m_banner_show" ';
        }else{
            str = str + 'class="m_banner_hide" ';
        }
        str = str + 'bgcolor="#FFFCDA" ';     // CHANGE BANNER COLOR HERE
        str = str + 'align="center" ';
        str = str + 'valign="top" >\n';
        if (this.aNodes[iCtr].hyperlink != ""){
            str = str + '<a href="'+this.aNodes[iCtr].hyperlink+'">';
        }

        if ( this.aNodes[iCtr].bannerType == "FLASH" ){
            str = str + '<OBJECT '
            str = str + 'classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" '
            str = str + 'codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" '
            str = str + 'WIDTH="'+this.aNodes[iCtr].width+'" '
            str = str + 'HEIGHT="'+this.aNodes[iCtr].height+'" '
            str = str + 'id="bnr_'+this.aNodes[iCtr].name+'" '
            str = str + 'ALIGN="" '
            str = str + 'VIEWASTEXT>'
            str = str + '<PARAM NAME=movie VALUE="'+ this.aNodes[iCtr].bannerPath + '">'
            str = str + '<PARAM NAME=quality VALUE=high>'
            str = str + '<PARAM NAME=bgcolor VALUE=#FFFCDA>'
            str = str + '<PARAM NAME=wmode VALUE=transparent>'
            str = str + '<PARAM NAME=loop VALUE="true">'
            str = str + '<EMBED ';
            str = str + 'src="'+this.aNodes[iCtr].bannerPath+'" '
            str = str + 'quality=high '
            //                     str = str + 'bgcolor=#FFFCDA '
            str = str + 'wmode="transparent" '
            str = str + 'loop="true" '
            str = str + 'WIDTH="'+this.aNodes[iCtr].width+'" '
            str = str + 'HEIGHT="'+this.aNodes[iCtr].height+'" '
            str = str + 'NAME="bnr_'+this.aNodes[iCtr].name+'" '
            str = str + 'ALIGN="center" '
            str = str + 'TYPE="application/x-shockwave-flash" '
            str = str + 'PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer">'
            str = str + '</EMBED>'
            str = str + '</OBJECT>'
        }else if ( this.aNodes[iCtr].bannerType == "IMAGE" ){
            str = str + '<img src="'+this.aNodes[iCtr].bannerPath+'" ';
            str = str + 'border="0" ';
            str = str + 'height="'+this.aNodes[iCtr].height+'" ';
            str = str + 'width="'+this.aNodes[iCtr].width+'">';
        }

        if (this.aNodes[iCtr].hyperlink != ""){
            str = str + '</a>';
        }

        str += '</span>';


    }
    return str;
};

// START THE BANNER ROTATION
Banner.prototype.start = function(){
    if(this.changeOnRefresh == false){
        this.changeBanner();
        var thisBannerObj = this.obj;
        // CURRENT BANNER IS ALREADY INCREMENTED IN cahngeBanner() FUNCTION
        setTimeout(thisBannerObj+".start()", this.aNodes[this.currentBanner].bannerDuration * 1000);
    }
}

// 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";
}

// Following Cookie Code taken from http://www.quirksmode.org
function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(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 c.substring(nameEQ.length,c.length);
    }
    return null;
}