function resize(img)
{
    var set=table_width-200
    if( img.width > img.height && img.width > set )
    {
        img.width = set
    }
    if( img.width < img.height && img.height > set)
    {
        img.height = set
    }
    if( img.width == img.height && img.width > set )
    {
        img.width = set
    }

    parent.document.all("board").style.height=document.body.scrollHeight;
    img.onclick = function (){window.open(img.src)};
    img.alt="点击弹出图片原始大小";
	img.style.cursor='hand';
}