function showThis(image){
	if((current != image) && (!transitioning)){
		transitioning = true;
		$('lg_img').fade({ 
				duration: .35, 
				afterFinish: function() { 
						$('lg_img').src = '../images/deliv_' + image + '.jpg';
				}
		});
		current = image;
	}
}

function imageAppear(){
		$('lg_img').appear({ 
				duration: .35,
				afterFinish: function() { 
						transitioning = false;
				}
		});
}

function clickSwap(image,direction){
	if(!transitioning){
		if(direction == 'forward'){
				if((image + 1) > num_images){
						showThis(1);
				} else {
						showThis(image + 1);
				}
		} else {
				if(image == 1){
						showThis(num_images);
				} else {
						showThis(image - 1);
				}
		}
	}
	return false;
}