function show(whichOne){
	if(whichOne == 1){
		tDiv = "div1";
		vDiv = "div2";
	}else{
		tDiv = "div2";
		vDiv = "div1";
	}
	if($(tDiv).fx){$(tDiv).fx.stop();}
	if($(vDiv).fx){$(vDiv).fx.stop();}
	$(tDiv).fx = $(tDiv).effect('opacity', {duration: 2000}).start(0);
	$(vDiv).fx = $(vDiv).effect('opacity', {duration: 2000}).start(1);	
}