/*** 两个数组中的整数进行加或减* 例如: a = [4, 5, 7, 9]; b = [5, 6, 100, 1];* a - b 的对应值* type: 表示要进行加还是减, 默认是加*/var subtractArray = function(a, b, type) {var tp = type !== true ? "+" : "-";return a.length ? [eval(a.shift()+tp+b.shift())].concat(this.subtractArray(a,b, type)) : [];}

/*** 判断字符串是否存在于给定数组中* needle: 要判断的字符串* array: 放入的数组* bool: 如果为true, 则返回needle在array中的位置*/var inArray = function (needle, array, bool) {if(typeof needle=="string" || typeof needle=="number"){ for(var i in array){if(needle===array[i]){if(bool){return i;}return true;}}return false;}},

var getDataType = function(data) {if(typeof data !=='object') {/*这里可以判断是否是string, number, boolean*/return typeof data;} else {if(data instanceof Array) {return 'array';} else if(data instanceof Object) {return 'object';} else {return 'null';}}},

function getNavigatorLanguage() {//判断浏览器接受的语言if((typeof browser_language) !== "undefined" && browser_language !== null) {// ievar lang = navigator.systemLanguage.toLowerCase();} else {// firefox chorme etc. var lang = navigator.language.toLowerCase();}return lang;}

// 获取浏览器名称和版本var getBrowser= (function(){var ua= navigator.userAgent, tem,M= ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];if(/trident/i.test(M[1])){tem=  /\brv[ :]+(\d+)/g.exec(ua) || [];return 'IE '+(tem[1] || '');}if(M[1]=== 'Chrome'){tem= ua.match(/\b(OPR|Edge)\/(\d+)/);if(tem!= null) return tem.slice(1).join(' ').replace('OPR', 'Opera');}M= M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?'];if((tem= ua.match(/version\/(\d+)/i))!= null) M.splice(1, 1, tem[1]);return M.join(' ');
})();