var mypics = new Array();
mypics[0] = new Image(380,160);
mypics[1] = new Image(380,160);
mypics[2] = new Image(380,160); //Image()の()内の数字は画像の幅・高さ（ピクセル数）
mypics[3] = new Image(380,160); // 画像の数に応じて増やす
mypics[4] = new Image(380,160);
mypics[5] = new Image(380,160);
mypics[6] = new Image(380,160);
mypics[7] = new Image(380,160);
mypics[8] = new Image(380,160);
mypics[9] = new Image(380,160);
mypics[0].src = "../shop/images/ozi0.gif"; // 表示したい画像のパスを指定
mypics[1].src = "../shop/images/ozi1.gif";
mypics[2].src = "../shop/images/ozi2.gif";
mypics[3].src = "../shop/images/ozi3.gif";
mypics[4].src = "../shop/images/ozi4.gif";
mypics[5].src = "../shop/images/ozi5.gif";
mypics[6].src = "../shop/images/ozi6.gif";
mypics[7].src = "../shop/images/ozi7.gif";
mypics[8].src = "../shop/images/ozi8.gif";
mypics[9].src = "../shop/images/ozi8.gif";

var i = 0;
function chgmypics() {
   i = (i==mypics.length-1) ? 0 : i+1;
   document.getElementById("pic").src = mypics[i].src;
}