var image_col = document.getElementById("menu_image_column");

function changeImage(imageNum)
{	
	newDiv = 'new_image'+imageNum;
	oldDiv = 'old_image';
	if($(oldDiv).fx){$(oldDiv).fx.stop();}
	if($(newDiv).fx){$(newDiv).fx.stop();}
	$(oldDiv).fx = $(oldDiv).effect('opacity', {duration: 2000}).start(0);
	$(newDiv).fx = $(newDiv).effect('opacity', {duration: 1000}).start(1);
}

function changeImageBack(imageNum)
{
	newDiv = 'new_image'+imageNum;
	oldDiv = 'old_image';
	if($(oldDiv).fx){$(oldDiv).fx.stop();}
	if($(newDiv).fx){$(newDiv).fx.stop();}
	$(oldDiv).fx = $(oldDiv).effect('opacity', {duration: 2000}).start(1);
	$(newDiv).fx = $(newDiv).effect('opacity', {duration: 1000}).start(0);	
}