相邻兄弟选择器（Adjacent sibling selector）可选择紧接在另一元素后的元素，且二者有相同父元素。选择相邻兄弟如果需要选择紧接在另一个元素后的元素，而且二者有相同的父元素，可以使用相邻兄弟选择器（Adjacent sibling selector）。例如，如果要增加紧接在 h1 元素后出现的段落的上边距，可以这样写：h1 + p {margin-top:50px;}这个选择器读作：“选择紧接在 h1 元素后出现的段落，h1 和 p 元素拥有共同的父元素”。例子：This is a heading.This is paragraph. This is paragraph.ht
The jQuery library supports nearly all of the selectors included in CSSspecifications 1 through 3, as outlined on the World Wide Web Consortium'ssite: http://www.w3.org/Style/CSS/specs. This support allows developersto enhance their websites without worrying about which browsers (particularlyInt
