function setupImageSwap()
{
	var imgs=document.getElementsByTagName('img');

	for (var i=0; i < imgs.length; i++)
	{
		if (inClass(imgs[i], 'swappableimage'))
		{
			addSwapEvents(imgs[i]);
		}
	}
	
	var mainim=document.getElementById('prodlargeim');
}

addEvent(window, 'load', setupImageSwap, false);

function addSwapEvents(im)
{
	var mainim=document.getElementById('prodlargeim');
	addEvent(im, 'click', function() {
		mainim.src = im.src+'&large';
		mainim.parentNode.href = im.src+'&vlarge';
	}, false);
}

function popMainIm()
{
	var mainim=document.getElementById('prodlargeim');
	var src=mainim.src.replace(/&large/, '&vlarge');
	window.open(src, '', 'width=840,height=630');
}