zeroa=new Image
 zeroa.src= "./images/down.gif"
 zerob=new Image
 zerob.src= "./images/up.gif"


 onea=new Image
 onea.src= "./images/down.gif"
 oneb=new Image
 oneb.src= "./images/up.gif"


 twoa=new Image
 twoa.src= "./images/down.gif"
 twob=new Image
 twob.src= "./images/up.gif"


 threea=new Image
 threea.src= "./images/down.gif"
 threeb=new Image
 threeb.src= "./images/up.gif"


 function Swap0(){
 	document.zero.src=zerob.src;return true;
 	}
 function Swap1(){
 	document.one.src=oneb.src;return true;
 	}
 function Swap2(){
 	document.two.src=twob.src;return true;
 	}
 function Swap3(){
 	document.three.src=threeb.src;return true;
 	}
 


 function SwapBack0(){
 	document.zero.src=zeroa.src;return true;
 	}
 function SwapBack1(){
 	document.one.src=onea.src;return true;
 	}
 function SwapBack2(){
 	document.two.src=twoa.src;return true;
 	}
 function SwapBack3(){
 	document.three.src=threea.src;return true;
 	}