var floatAD = {
    adWidth : 80,//廣告寬度
    nowX : 1000,//目前位置(left)
    nowY : 100,//目前位置(top)
    posX : 0,
    posY: 0,

    fadIni : function(){
        var innerWidth = document.body.clientWidth;
        var innerHeight = document.body.clientHeight;

        var edge = ( innerWidth - 1000 ) / 2;

        if( edge > floatAD.adWidth ){
            floatAD.posX = edge + 1000;
        } else {
            floatAD.posX = innerWidth - floatAD.adWidth;
        }

        floatAD.posY = 100;
    },

    fadRefresh : function(){
        var offsetX = floatAD.posX + document.documentElement.scrollLeft - floatAD.nowX;
        var offsetY = floatAD.posY + document.documentElement.scrollTop - floatAD.nowY;

        floatAD.nowX += offsetX / 5;
        floatAD.nowY += offsetY / 5;
        document.getElementById('iRFloating').style.left = floatAD.nowX + 'px';
        document.getElementById('iRFloating').style.top = floatAD.nowY + 'px';
        floatID = setTimeout( 'floatAD.fadRefresh()', 500 );//Refresh時間
    },

    fadStart : function(){

        var adBlock = document.createElement("div");
        adBlock.id = 'iRFloating';
        adBlock.style.position = 'absolute';
        adBlock.style.top = 100;
        adBlock.style.left = 1000;

        var adLink = document.createElement("a");
        adLink.href = 'http://www.urmoco.com/events/christmas/';

        var adImg = new Image();
        adImg.src = 'http://img.urmoco.com/events/christmas/images/christmas_float.gif';
        adImg.alt = '聖誕節拉霸活動';
        adImg.title = '聖誕節拉霸活動';
        adImg.border = 0;
        adImg.width = 80;

        adLink.appendChild( adImg );
        adBlock.appendChild( adLink );

        document.getElementsByTagName("body")[0].appendChild( adBlock );


        floatAD.fadIni();
        window.onresize = floatAD.fadIni;
        floatAD.fadRefresh();
    },

    mediaStart : function(){

        var adBlock = document.createElement("div");
        adBlock.id = 'iRFloating';
        adBlock.style.position = 'absolute';
        adBlock.style.top = 100;
        adBlock.style.left = 1000;
        adBlock.style.zIndex = 1000;

        var container = document.createElement("div");
        container.id = "media_container";
        container.style.width = "0px";
        //container.style.border = "dashed 2px yellow";
        container.style.zIndex = 1000;        
        
        
        adBlock.appendChild( container );
        
        //adBlock.style.visibility = "hidden";

        document.getElementsByTagName("body")[0].appendChild( adBlock );

        floatAD.fadIni();
        window.onresize = floatAD.fadIni;
        floatAD.fadRefresh();
    }
}