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by Ross ShannonSelectors are the way you reference the parts of your HTML documents with the styles you want to have applied to them. CSS2 and CSS3 brought with them a host of new selector specifications, designed to allow greater access to the elements and parts of those elements that make up each and every webpage. These new syntax rules allow greater flexibility and accuracy in defining exactly which parts of your page get styled.[@more@]Browser Compatibility Note:» Firefox, » Moz

innerHTML获取标签内的HTMLouterHTML获取标签及标签内的HTMLinnerTEXT和outerTEXT都是获取标签内的文本，相同。[@more@]This is a DIV!结果：innerHTML：outerHTML：This is a DIV!innerText and outerText ：This is a DIV!This is a DIV!