Java script Gallery - how to show a next image with an arrow - shiftImg(1)
- by Srikanth Naidu
//html file
Image slideshow
</script>
Loading image. Please wait
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//
//JS File
var displayWaitMessage=true; // Display a please wait message while images are loading?
var activeImage = false;
var imageGalleryLeftPos = false;
var imageGalleryWidth = false;
var imageGalleryObj = false;
var maxGalleryXPos = false;
var slideSpeed = 0;
var imageGalleryCaptions = new Array();
function startSlide(e)
{
if(document.all)e = event;
var id = this.id;
this.getElementsByTagName('IMG')[0].src = 'images/' + this.id + '_over.gif';
if(this.id=='arrow_right'){
slideSpeedMultiply = Math.floor((e.clientX - this.offsetLeft) / 5);
slideSpeed = -1*slideSpeedMultiply;
slideSpeed = Math.max(-10,slideSpeed);
}else{
slideSpeedMultiply = 10 - Math.floor((e.clientX - this.offsetLeft) / 5);
slideSpeed = 1*slideSpeedMultiply;
slideSpeed = Math.min(10,slideSpeed);
if(slideSpeed<0)slideSpeed=10;
}
}
function releaseSlide()
{
var id = this.id;
this.getElementsByTagName('IMG')[0].src = 'images/' + this.id + '.gif';
slideSpeed=0;
}
function gallerySlide()
{
if(slideSpeed!=0){
var leftPos = imageGalleryObj.offsetLeft;
leftPos = leftPos/1 + slideSpeed;
if(leftPos>maxGalleryXPos){
leftPos = maxGalleryXPos;
slideSpeed = 0;
}
if(leftPos<minGalleryXPos){
leftPos = minGalleryXPos;
slideSpeed=0;
}
imageGalleryObj.style.left = leftPos + 'px';
}
setTimeout('gallerySlide()',20);
}
function showImage()
{
if(activeImage){
activeImage.style.filter = 'alpha(opacity=50)';
activeImage.style.opacity = 0.5;
}
this.style.filter = 'alpha(opacity=100)';
this.style.opacity = 1;
activeImage = this;
}
function initSlideShow()
{
document.getElementById('arrow_left').onmousemove = startSlide;
document.getElementById('arrow_left').onmouseout = releaseSlide;
document.getElementById('arrow_right').onmousemove = startSlide;
document.getElementById('arrow_right').onmouseout = releaseSlide;
imageGalleryObj = document.getElementById('theImages');
imageGalleryLeftPos = imageGalleryObj.offsetLeft;
imageGalleryWidth = document.getElementById('galleryContainer').offsetWidth - 80;
maxGalleryXPos = imageGalleryObj.offsetLeft;
minGalleryXPos = imageGalleryWidth - document.getElementById('slideEnd').offsetLeft;
var slideshowImages = imageGalleryObj.getElementsByTagName('IMG');
for(var no=0;no<slideshowImages.length;no++){
slideshowImages[no].onmouseover = showImage;
}
var divs = imageGalleryObj.getElementsByTagName('DIV');
for(var no=0;no<divs.length;no++){
if(divs[no].className=='imageCaption')imageGalleryCaptions[imageGalleryCaptions.length] = divs[no].innerHTML;
}
gallerySlide();
}
function showPreview(imagePath,imageIndex){
var subImages = document.getElementById('previewPane').getElementsByTagName('IMG');
if(subImages.length==0){
var img = document.createElement('IMG');
document.getElementById('previewPane').appendChild(img);
}else img = subImages[0];
if(displayWaitMessage){
document.getElementById('waitMessage').style.display='inline';
}
document.getElementById('largeImageCaption').style.display='none';
img.onload = function() { hideWaitMessageAndShowCaption(imageIndex-1); };
img.src = imagePath;
}
function hideWaitMessageAndShowCaption(imageIndex)
{
document.getElementById('waitMessage').style.display='none';
document.getElementById('largeImageCaption').innerHTML = imageGalleryCaptions[imageIndex];
document.getElementById('largeImageCaption').style.display='block';
}
function shiftImg(imageIndex){
}
window.onload = initSlideShow;
