function Banner_Rotation(container){
	var children = document.getElementById(container).getElementsByTagName('img');
	var active = 0;
	// find child with display block and set that as active
	for(i = 0; i <= children.length - 1; i++){
		if(children[i].style.display == "block"){
			active = i;
		}
	}
	// check if active is over limit
	// hide active
	if(active >= children.length - 1){
		children[active].style.display = "none";
		active = 0;
	}else{
		children[active].style.display = "none";
		active++;
	}
	// unhide next
	children[active].style.display = "block";
}