W3C验证器错误

Question

When I use W3c validater for checking my site it shows

"required attribute "alt" not specified" and also

" The attribute given above is required for an element that you've used, but you have omitted it. For instance, in most HTML and XHTML document types the "type" attribute is required on the "script" element and the "alt" attribute is required for the "img" element. Typical values for type are type="text/css" for and type="text/javascript" for . "

How can I solve this issue?

Screenshot:

This is my coding:

protected string GetImageStyle(ImageStub image)
    {
        if (!image.ImageID.IsNull)
        {
            image = image.ScaleOptimalWidth(75, 75);
            return String.Format("width:75px;height:75px;align='left';-moz-border-radius: 6px;-webkit-border-radius: 6px;border-radius: 6px; padding-left: 2px;alt='img';");
        }

        return "width:75px;height:75px;align='left';alt='img'";
    }

Answer 1

将alt属性添加到您的<img />标记中。