imFile=["image0.jpg","image1.jpg","image2.jpg","image3.jpg","image4.jpg","image5.jpg"];
imNo=0;
imMax=imFile.length;
document.write("<div align='center'>");
document.write("<img src="+imFile[0]+" name='pic'><br><br>");
document.write("<input type='button' value='戻る' onclick='back()'>");
document.write(" <input type='button' value='進む' onclick='next()'>");
document.write("</div>");
document.write("<div align='right'>");
document.write("<span style='font-size:9px;background-color:rgb(200,200,200);'><a
href='http://plusone.jpn.org/javascript/' target='_blank'>+1JavaScript</a></span>");
document.write("</div>");
function next()
{
imNo++;
if(imNo>=imMax){imNo=0;}
document.pic.src=imFile[imNo];
}
function back()
{
imNo--;
if(imNo<0){imNo=imMax-1;}
document.pic.src=imFile[imNo];
}
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