function AlternatePhoto2(obj)
{
    if(obj)
    {
        //图片路径
	obj.className='active';
        var imgpath = obj.src;
        imgpath = imgpath.toLowerCase();
        
        var MiddleImgPath = imgpath.replace("/picsmall-","/picmiddle-");
        var BigImgPath = imgpath.replace("/picsmall-","/");
        
        document.getElementById("ForProductImage2").src = MiddleImgPath;
        document.getElementById("ForProductImage2").alt = BigImgPath;
        $("#ForProductImage2").attr("jqimg",BigImgPath);
        $("#ForProductImage2").hide().fadeIn('slow');
    }
}