* Return the first value that is defined. Like MooTools' $.pick.

* Extend an object with the members of another * @param {Object} a The object to be extended * @param {Object} b The object to add to the first one

* Deep merge two or more objects and return a third object. * Previously this function redirected to jQuery.extend(true), but this had two limitation

* Returns true if the object is not null or undefined. Like MooTools' $.defined. * @param {Object} obj

* Shortcut for parseInt * @param {Object} s * @param {Number} mag Magnitude

* Set or get an attribute or an object of attributes. Can't use jQuery attr because * it attempts to set expando properties on the SVG element, which

* Set CSS on a given element * @param {Object} el * @param {Object} styles Style object with camel case property names

* Utility function to create element with attributes and styles * @param {Object} tag * @param {Object} attribs * @param {Object} styles * @param

* Wrap a method with extended functionality, preserving the original function * @param {Object} obj The context object that the method belongs to *

* 上传错误检查 * @param $errCode * @return string */