var currentThumbnail = 0;
var imgThumbnails = null;
document.observe("dom:loaded", function() {
	if (thumbnails != null && thumbnails || undefined) {
		imgThumbnails = new Array(thumbnails.length);
		for (var i = 0; i < thumbnails.length; ++i) {
			imgThumbnails[i] = new Image();
			imgThumbnails[i].src = thumbnails[i];
		}
	}
});

firstThumbnail = function() {
	currentThumbnail = 0;
	displayThumbnail(currentThumbnail);
}

nextThumbnail = function() {
	if (currentThumbnail < imgThumbnails.length - 1) {
		currentThumbnail++;	
		displayThumbnail(currentThumbnail);
	}
}

previousThumbnail = function() {
	if (currentThumbnail > 0) {
		currentThumbnail--;	
		displayThumbnail(currentThumbnail);
	}
}


lastThumbnail = function() {
	currentThumbnail = imgThumbnails.length - 1;
	displayThumbnail(currentThumbnail);
}

displayThumbnail = function (index) {
    var img = $('ctl00_leftBar_imgCurrentThumbnal');
    var pageNo = $('currentPDFNo');
    var link = $('ctl00_leftBar_lnkCurrentPDF');
    if (img != undefined) {
        var thumbPath = imgThumbnails[index].src;
        img.src = thumbPath;
        var tempArray = thumbPath.split('thumbnails/');
        if (tempArray.length == 2) {
            var tempArray2 = tempArray[1].split('-');
            if (tempArray2.length == 2) {
                tempArray[0] = tempArray[0].toLowerCase();
                tempArray[0] = tempArray[0].substr(tempArray[0].indexOf('newssource'));
                var pdfPath = tempArray[0] + tempArray2[0] + '.pdf';
                
                link.href = "#";
                link.setAttribute("onclick", "document.location='Download.aspx?file=" + pdfPath + "'");
            }
        }
    }
    if (pageNo != undefined) {
        pageNo.update(index + 1);
    }
}