function changeBorderColor(myElement, myColor)
{
	myElement.style.borderColor = myColor;
}

function changeOpacity(catID, opTo)
{
	myElement1 = document.getElementById('img' + catID);
	myElement2 = document.getElementById('txt' + catID);
	new Effect.Opacity(myElement1, { to: opTo, duration: 0.01, queue: { position: 'end', scope: 'catalog1', limit: 1 }});
	new Effect.Opacity(myElement2, { to: opTo, duration: 0.01, queue: { position: 'end', scope: 'catalog2', limit: 1 }});
}