var bookProductPage = (((typeof document.forms[0].PageType != "undefined")&&(document.forms[0].PageType.value == "onixProduct"))
&& ((typeof document.forms[0].Subsection != "undefined")&&(document.forms[0].Subsection.value == "Titles")))

if(bookProductPage)//Is it a onix book page
{
    var smallImg = smallCoverExist();
    var pdf = pdfExist();
    var audio = audioExist();
    
    if(smallImg)//if small image exist
    {
       var largeImg = largeCoverExist(smallImg);
       if(largeImg)
       {
            var imgParent = document.getElementById('edDeskBody').getElementsByTagName('img')[0].parentNode;
            
            var oAnchor = document.createElement('a');
            oAnchor.className = 'downloadCoverLink';
            oAnchor.setAttribute('href',largeImg);
            oAnchor.setAttribute('target','_blank');
            oAnchor.appendChild(document.createTextNode('Download cover image'));
            imgParent.appendChild(oAnchor);
       } 
    } else {
                var oImg = document.getElementById('edDeskBody').getElementsByTagName('img')[0];
                oImg.src = 'templates/layout/$file/noCover.gif';
           }
    
    if(pdf)
    {
            
            var imgParent = document.getElementById('edDeskBody').getElementsByTagName('img')[0].parentNode;
            //imgParent.appendChild(document.createElement('br'));
            var oAnchor = document.createElement('a');
            oAnchor.className = 'downloadCoverLink pdflink';
            oAnchor.setAttribute('href',pdf);
            oAnchor.setAttribute('target','_blank');
            oAnchor.appendChild(document.createTextNode('View sample pages'));
            imgParent.appendChild(oAnchor);
    } 
    
    if(audio)
    {
        var imgParent = document.getElementById('edDeskBody').getElementsByTagName('img')[0].parentNode;
        
        var oAnchor = document.createElement('a');
        oAnchor.className = 'downloadCoverLink pdflink';
        oAnchor.setAttribute('href',audio);
        oAnchor.setAttribute('target','_blank');
        oAnchor.appendChild(document.createTextNode('Listen to sample audio'));
        imgParent.appendChild(oAnchor);
    }

}

function largeCoverExist(imgPath)
{
    var winLoc = window.location.toString();
    if(winLoc.indexOf('macmillan.com.au') != -1)//Is it the test site
    {
        var largeImgPath = imgPath.replace('/mea/covers/','/mea/downloadcovers/');
    } else {
                var largeImgPath = imgPath.replace('/mea/','/mea/downloadcovers/');
           }
    var imgLoad = new HeaderLoader(largeImgPath);
    if(imgLoad.exist)
    {
        return largeImgPath;
    } else {
        return;
    }
}

function smallCoverExist()
{
    var oImg = document.getElementById('edDeskBody').getElementsByTagName('img');
    if(typeof oImg != 'undefined' && oImg.length == 1)
    {
        var imgPath = replaceURL(oImg[0].getAttribute('src'));
        
        var imgLoad = new HeaderLoader(imgPath);
        if(imgLoad.exist)
        {
            return imgPath;
        } else {
            return;
        }
    }
}

function pdfExist()
{
    var oImg = document.getElementById('edDeskBody').getElementsByTagName('img');
    if(typeof oImg != 'undefined' && oImg.length == 1)
    {
        var imgPath = replaceURL(oImg[0].getAttribute('src'));
        
        var winLoc = window.location.toString();
        if(winLoc.indexOf('macmillan.com.au') != -1)//Is it the test site
        {
            var pdfPath = imgPath.replace('/mea/covers/','/mea/downloadpdfs/');
        } else {
                    var pdfPath = imgPath.replace('/mea/','/mea/downloadpdfs/');
               }
               
        pdfPath = pdfPath.toLowerCase().replace('jpg','pdf');
            
        var pdfLoad = new HeaderLoader(pdfPath);
        if(pdfLoad.exist)
        {
            return pdfPath;
        } else {
            return;
        }
    }
}

function audioExist()
{
    var oImg = document.getElementById('edDeskBody').getElementsByTagName('img');
    if(typeof oImg != 'undefined' && oImg.length == 1)
    {
        var imgPath = replaceURL(oImg[0].getAttribute('src'));
        
        var winLoc = window.location.toString();
        if(winLoc.indexOf('macmillan.com.au') != -1)//Is it the test site
        {
            var audioPath = imgPath.replace('/mea/covers/','/mea/downloadaudio/');
        } else {
                    var audioPath = imgPath.replace('/mea/','/mea/downloadaudio/');
               }
               
        var fileTypes = ['mp3','mp4','wmv','wma'];
        
        //Loop through file types and return the first one that exists
        for(var i = 0; i < fileTypes.length; i++)
        { 
            //Get file extension to replace in file url
            if(i == 0)
            {
                var strReplace = 'jpg';
            } else {    
                        var strReplace = fileTypes[i-1];       
                   }
                   
            audioPath = audioPath.toLowerCase().replace(strReplace,fileTypes[i]);
            
            var audioLoad = new HeaderLoader(audioPath);
            
            if(audioLoad.exist)//if file exist
            {
                return audioPath;
            }
        
        }
        return;
    }
}

function replaceURL(imgPath)
{
    var winLoc = window.location.toString();
    if(imgPath.indexOf('macmillan.com.au') != -1 && winLoc.indexOf('macmillan.com.au') == -1)
    {
            return imgPath.replace('http://www.macmillan.com.au/mea/covers/','http://primarydev.itechne.com/files/mea/');
    } else {
                return imgPath;
           }
}