imgtop=new Image();
imgtop.src="img/top_o.gif";

imgtop2=new Image();
imgtop2.src="img/top_n.gif";

function imageOn(imageName){
             document[imageName].src=imgtop.src;
}

function imageOff(imageName){
             document[imageName].src=imgtop2.src;
}

imgkushi=new Image();
imgkushi.src="img/kushi_o.gif";

imgkushi2=new Image();
imgkushi2.src="img/kushi_n.gif";

function imageOn6(imageName){
             document[imageName].src=imgkushi.src;
}

function imageOff6(imageName){
             document[imageName].src=imgkushi2.src;
}

imglink=new Image();
imglink.src="img/link_o.gif";

imglink2=new Image();
imglink2.src="img/link_n.gif";

function imageOn7(imageName){
             document[imageName].src=imglink.src;
}

function imageOff7(imageName){
             document[imageName].src=imglink2.src;
}


imghinai=new Image();
imghinai.src="img/hinai_o.gif";

imghinai2=new Image();
imghinai2.src="img/hinai_n.gif";

function imageOn1(imageName){
             document[imageName].src=imghinai.src;
}

function imageOff1(imageName){
             document[imageName].src=imghinai2.src;
}

imgfugu=new Image();
imgfugu.src="img/fugu_o.gif";

imgfugu2=new Image();
imgfugu2.src="img/fugu_n.gif";

function imageOn2(imageName){
             document[imageName].src=imgfugu.src;
}

function imageOff2(imageName){
             document[imageName].src=imgfugu2.src;
}

imgsake=new Image();
imgsake.src="img/sake_o.gif";

imgsake2=new Image();
imgsake2.src="img/sake_n.gif";

function imageOn3(imageName){
             document[imageName].src=imgsake.src;
}

function imageOff3(imageName){
             document[imageName].src=imgsake2.src;
}

imgtoritake=new Image();
imgtoritake.src="img/annai_o.gif";

imgtoritake2=new Image();
imgtoritake2.src="img/annai_n.gif";

function imageOn4(imageName){
             document[imageName].src=imgtoritake.src;
}

function imageOff4(imageName){
             document[imageName].src=imgtoritake2.src;
}

imgbase=new Image();
imgbase.src="img/base_o.gif";

imgbase2=new Image();
imgbase2.src="img/base_n.gif";

function imageOn5(imageName){
             document[imageName].src=imgbase.src;
}

function imageOff5(imageName){
             document[imageName].src=imgbase2.src;
}