var imgM = new Array();
        imgM[0] = new Image();  imgM[0].src = "image_navi/01a.gif";
        imgM[1] = new Image();  imgM[1].src = "image_navi/01b.gif";
        imgM[2] = new Image();  imgM[2].src = "image_navi/02a.gif";
        imgM[3] = new Image();  imgM[3].src = "image_navi/02b.gif";
        imgM[4] = new Image();  imgM[4].src = "image_navi/03a.gif";
        imgM[5] = new Image();  imgM[5].src = "image_navi/03b.gif";
        imgM[6] = new Image();  imgM[6].src = "image_navi/04a.gif";
        imgM[7] = new Image();  imgM[7].src = "image_navi/04b.gif";
        imgM[8] = new Image();  imgM[8].src = "image_navi/05a.gif";
        imgM[9] = new Image();  imgM[9].src = "image_navi/05b.gif";
        imgM[10] = new Image();  imgM[10].src = "image_navi/06b.gif";
        imgM[11] = new Image();  imgM[11].src = "image_navi/06a.gif";
        imgM[12] = new Image();  imgM[12].src = "image_navi/07a.gif";
        imgM[13] = new Image();  imgM[13].src = "image_navi/07b.gif";

function Min(nam,num) {
         document.images[nam].src = imgM[num].src;
}

function Mout(nam,num) {
         document.images[nam].src = imgM[num].src;
}