var _timer = null;
var bannerImageId = "";
var bannerNumberId = "";
var bannerLocation = "";
var bannerData = "";
var cycleTime =  5;
var fadeDuration = 1;

var banner = {    
    init: function(imageId, numberId, location, data, cTime, fDuration) {

        bannerImageId = imageId;
        bannerNumberId = numberId;
        bannerLocation = location;
        bannerData = data.split("|");
        cycleTime = cTime;
        fadeDuration = fDuration; 
       
        _timer = setTimeout("RefreshBanner()",cycleTime*1000);    
    }
};
    
     function OpenBannerAdLink()
     {
        clearTimeout(_timer);
        var bannerNumberObj = document.getElementById(bannerNumberId);   
        if (bannerNumberObj != null)
        {   

            var nextNumber = parseInt(bannerNumberObj.value);                
            var link = bannerData[nextNumber+2];         
            
            window.location = link;  
        }               
      
        return false;    
        	    
    }

      function RotateToImage(ImageID)
      {
            clearTimeout(_timer);
            var bannerNumberObj = document.getElementById(bannerNumberId);   

            if (bannerNumberObj != null)
            {   
                var nextNumber = parseInt(ImageID) * 3;
                  
                bannerNumberObj.value = nextNumber;
                var Source = bannerLocation + bannerData[nextNumber];
                var bannerImageObj = document.getElementById(bannerImageId);

                crossfade(bannerImageObj, Source , 0,  bannerData[nextNumber+1]);      
                
                //ClevelandClinic.MOSS.UserControls.BannerAds.GetBannerData(parseInt(bannerNumberObj.value), location.href,  RefreshBanner_callback);
            }               
            //commented out because _Start is undefined and IE throws java error
           // _timer = window.setTimeout("RotateImages("+(_Start)+")",9000);
        
        
        return false;    
            	    
      }

    function RefreshBanner()
    {    
        clearTimeout(_timer);
        var bannerNumberObj = document.getElementById(bannerNumberId);   
       
       

        if (bannerNumberObj != null)
        {   
            var nextNumber = parseInt(bannerNumberObj.value) + 3;
            if (nextNumber >= bannerData.length)
                nextNumber = 0;               
                                
           
            bannerNumberObj.value = nextNumber;
            var Source = bannerLocation + bannerData[nextNumber];
            var bannerImageObj = document.getElementById(bannerImageId);

            crossfade(bannerImageObj, Source , fadeDuration,  bannerData[nextNumber+1]);      
            
            //ClevelandClinic.MOSS.UserControls.BannerAds.GetBannerData(parseInt(bannerNumberObj.value), location.href,  RefreshBanner_callback);
        }               
        
        _timer = setTimeout("RefreshBanner()",cycleTime*1000);     
    }
    
    function RefreshBanner_callback(bannerData)
    {
        
        if (bannerData.value != null)
        {
            var banner = bannerData.value;
             
            var bannerImageObj = document.getElementById(bannerImageId);
            
            var bannerNumberObj = document.getElementById(bannerNumberId);   
            
            bannerNumberObj.value = banner.Number;
            
        
            
            crossfade(bannerImageObj, banner.Source, fadeDuration, banner.Title);//, imageHeight, imageWidth);    
       
        }
    }

  

// IXF1.11 :: Image cross-fade 
// *****************************************************
// DOM scripting by brothercake -- http://www.brothercake.com/
//******************************************************
//global object
var ixf = { 'clock' : null, 'count' : 1 }

//crossfade setup function
function crossfade()
{
	//if the timer is not already going
	if(ixf.clock == null)
	{
		//copy the image object 
		ixf.obj = arguments[0];
		
		
		
		//copy the image src argument

		//ixf.width = arguments[5];
		//ixf.height = arguments[4];	
			 
		ixf.src = arguments[1];
		
		ixf.obj.style.filter = 'alpha(opacity=100)';
		//store the supported form of opacity
		if(typeof ixf.obj.style.opacity != 'undefined')
		{
			ixf.type = 'w3c';
		}
		else if(typeof ixf.obj.style.MozOpacity != 'undefined')
		{
			ixf.type = 'moz';
		}
		else if(typeof ixf.obj.style.KhtmlOpacity != 'undefined')
		{
			ixf.type = 'khtml';
		}
		else if(typeof ixf.obj.filters == 'object')
		{
			//weed out win/ie5.0 by testing the length of the filters collection (where filters is an object with no data)
			//then weed out mac/ie5 by testing first the existence of the alpha object (to prevent errors in win/ie5.0)
			//then the returned value type, which should be a number, but in mac/ie5 is an empty string
			ixf.type = (ixf.obj.filters.length > 0 && typeof ixf.obj.filters.alpha == 'object' && typeof ixf.obj.filters.alpha.opacity == 'number') ? 'ie' : 'none';
		}
		else
		{
			ixf.type = 'none';
		}
		
		//change the image alt text if defined
		if(typeof arguments[3] != 'undefined' && arguments[3] != '')
		{
			ixf.obj.alt = arguments[3];
			var mapArea = document.getElementById('bannerAdsMapArea');
			if (mapArea != null)
			{
			    mapArea.title = arguments[3];
			}
		}
		
		//if any kind of opacity is supported
		if(ixf.type != 'none')
		{
			//create a new image object and append it to body
			//detecting support for namespaced element creation, in case we're in the XML DOM
			ixf.newimg = document.getElementsByTagName('body')[0].appendChild((typeof document.createElementNS != 'undefined') ? document.createElementNS('http://www.w3.org/1999/xhtml', 'img') : document.createElement('img'));

			//set positioning classname
			//ixf.newimg.className = 'idupe';
			
			//set src to new image src
			//ixf.newimg.width = ixf.width;
		    //ixf.newimg.height = ixf.height;		
		
			ixf.newimg.src = ixf.src

            ixf.newimg.style.position = 'absolute';
			ixf.newimg.style.zIndex = 30000;
			ixf.newimg.style.visibility = 'hidden'
			ixf.newimg.style.filter = 'alpha(opacity=100)';
			
			//move it to superimpose original image
			ixf.newimg.style.left = ixf.getRealPosition(ixf.obj, 'x') + 'px';
			ixf.newimg.style.top = ixf.getRealPosition(ixf.obj, 'y') + 'px';
			
			//copy and convert fade duration argument 
			ixf.length = parseInt(arguments[2], 10) * 1000;
			
			//create fade resolution argument as 20 steps per transition
			ixf.resolution = parseInt(arguments[2], 10) * 20;
			
			//start the timer
			ixf.clock = setInterval('ixf.crossfade()', ixf.length/ixf.resolution);
		}
		
		//otherwise if opacity is not supported
		else
		{
			//just do the image swap
			ixf.obj.src = ixf.src;
		}
		
	}
};


//crossfade timer function
ixf.crossfade = function()
{
	//decrease the counter on a linear scale
	ixf.count -= (1 / ixf.resolution);
	
	//if the counter has reached the bottom
	if(ixf.count < (1 / ixf.resolution))
	{
		//clear the timer
		clearInterval(ixf.clock);
		ixf.clock = null;
		
		//reset the counter
		ixf.count = 1;
		
		//set the original image to the src of the new image
		ixf.obj.src = ixf.src;
	}
	
	//set new opacity value on both elements
	//using whatever method is supported
	switch(ixf.type)
	{
		case 'ie' :
			ixf.obj.filters.alpha.opacity = ixf.count * 100;
			ixf.newimg.filters.alpha.opacity = (1 - ixf.count) * 100;
			break;
			
		case 'khtml' :
			ixf.obj.style.KhtmlOpacity = ixf.count;
			ixf.newimg.style.KhtmlOpacity = (1 - ixf.count);
			break;
			
		case 'moz' : 
			//restrict max opacity to prevent a visual popping effect in firefox
			ixf.obj.style.MozOpacity = (ixf.count == 1 ? 0.9999999 : ixf.count);
			ixf.newimg.style.MozOpacity = (1 - ixf.count);
			break;
			
		default : 
			//restrict max opacity to prevent a visual popping effect in firefox
			ixf.obj.style.opacity = (ixf.count == 1 ? 0.9999999 : ixf.count);
			ixf.newimg.style.opacity = (1 - ixf.count);
	}
	
	//now that we've gone through one fade iteration 
	//we can show the image that's fading in
	ixf.newimg.style.visibility = 'visible';
	
	//keep new image in position with original image
	//in case text size changes mid transition or something
	ixf.newimg.style.left = ixf.getRealPosition(ixf.obj, 'x') + 'px';
	ixf.newimg.style.top = ixf.getRealPosition(ixf.obj, 'y') + 'px';
	
	//if the counter is at the top, which is just after the timer has finished
	if(ixf.count == 1)
	{
		//remove the duplicate image
		ixf.newimg.parentNode.removeChild(ixf.newimg);
	}
};



//get real position method
ixf.getRealPosition = function()
{
	this.pos = (arguments[1] == 'x') ? arguments[0].offsetLeft : arguments[0].offsetTop;
	this.tmp = arguments[0].offsetParent;
	while(this.tmp != null)
	{
		this.pos += (arguments[1] == 'x') ? this.tmp.offsetLeft : this.tmp.offsetTop;
		this.tmp = this.tmp.offsetParent;
	}
	
	return this.pos;
};