>[info]加载JavaScript文件（异步）
```javascript
loadScript(src, onLoad)
```
>[info]判断是否定义了属性
```javascript
isDefined(property)
```
>[info]控制台中输出错误
```javascript
logConsoleError(message)
```
>[info] 设定Cookie值
```javascript
setCookie(cookieName, value, msToExpire, path, domain, isSecure)
```
>[info]获取Cookie值
```javascript
getCookie(cookieName)
```
>[info]字符串开头对比，返回 ture/false
```javascript
stringStartsWith(str, prefix)
```
>[info]字符串末尾对比，返回 ture/false
```javascript
stringEndsWith(str, suffix)
```
>[info]是否存在字符串，返回 ture/false
```javascript
stringContains(str, needle)
```
>[info]从字符串末尾删除字符
```javascript
removeCharactersFromEndOfString(str, numCharactersToRemove)
```
>[info]添加 url 参数，配合 removeUrlParameter 使用
```javascript
addUrlParameter(url, name, value)
```
>[info]移除 url 参数
```javascript
removeUrlParameter(url, name)
```
>[info]获取 url 参数
```javascript
getUrlParameter(url, name)
```
>[info]sha1
```javascript
sha1(str)
```
>[info]检查DOM元素是否真正可见
```javascript
isVisible(node)
```
