var imgList = new Array(7);

imgList[1] = new Image();
imgList[1].src = "/images/spazioespositivo/1.jpg";
imgList[2] = new Image();
imgList[2].src = "/images/spazioespositivo/2.jpg";
imgList[3] = new Image();
imgList[3].src = "/images/spazioespositivo/3.jpg";
imgList[4] = new Image();
imgList[4].src = "/images/spazioespositivo/4.jpg";
imgList[5] = new Image();
imgList[5].src = "/images/spazioespositivo/5.jpg";
imgList[6] = new Image();
imgList[6].src = "/images/spazioespositivo/6.jpg";

function ShowImage(p)	{
   document.getElementById('mainfoto').src = imgList[p].src;
}