var currentBlock = 0;
var blocks = $('zero_gallery_container').getChildren();
var numBlocks = blocks.length;

var display = $('zero_gallery_display');
var container = $('zero_gallery_container');

display.setStyle('display', 'block');
container.setStyle('display', 'none');

blocks[currentBlock].inject(display, 'top');

/*
$('zero_gallery_leftarrow').addEvents({'click': function(){prevImage();}, 'mouseover': function(){this.fade(1)}, 'mouseout': function(){this.fade(0.5)} });
$('zero_gallery_rightarrow').addEvents({'click': function(){nextImage();}, 'mouseover': function(){this.fade(1)}, 'mouseout': function(){this.fade(0.5)} });
$('zero_gallery_leftarrow').fade(0.5);
$('zero_gallery_rightarrow').fade(0.5);
*/

function selectImage(imgNr) 
{
 blocks[currentBlock].fade('out');
 blocks[currentBlock].inject(container);
 currentBlock = imgNr;
 blocks[currentBlock].fade('hide');
 blocks[currentBlock].inject(display, 'top');
 blocks[currentBlock].fade('in');
}

function nextImage() 
{
 blocks[currentBlock].fade('out');
 blocks[currentBlock].inject(container);
 currentBlock = (currentBlock+1)%numBlocks;
 blocks[currentBlock].fade('hide');
 blocks[currentBlock].inject(display, 'top');
 blocks[currentBlock].fade('in');
}

function prevImage() 
{
 blocks[currentBlock].fade('out');
 blocks[currentBlock].inject(container);
 currentBlock = (currentBlock-1+numBlocks)%numBlocks;
 blocks[currentBlock].fade('hide');
 blocks[currentBlock].inject(display, 'top');
 blocks[currentBlock].fade('in');
}