var styleSheets = document.styleSheets;for (var i = 0; i < styleSheets.length; ++i) {var cssRules = styleSheets[i].cssRules || styleSheets[i].rules;//获取某个style元素中所有规则集for (var j = 0; j < cssRules.length; ++j) {var cssRule = cssRules[j];//获取某个规则集console.info(cssRule.selectorText + " {");//获取该规则集的选择器for (var k = 0; k < cssRule.style.length; ++k) {var propertyName = cssRule.style[k];//获取属性名var propertyValue = cssRule.style[propertyName];//获取属性值console.info(propertyName + ":" + propertyValue);}console.info("}");}}