1.HTML is all bout applying meaning to content. The span & div tags apply no meaning at all=meaningless tags They are used quite extensively in conjunction with CSS. Group together a chunk of HTML and hook some information onto that chunk,with at…
CSS实现Div透明,而显示在上面的文字不透明,但也可看到显示在下面的图片内容,DiV透明其实挺简单,主要是为background定义opacity属性,一般这个是最大值是1,数值越接近1,则越不透明,也就是越小越透明,颜色可以自定义.这样可以让图片上的文字更清淅,在一些图片特效中我们会见到这种效果. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/…