*IE动态创建Radio的时候 必须先指定Name属性
1、radio在没有name属性时是选择不了的，name属性起了对几个radio分组的作用，而checkbox没有此限制
2、The NAME attribute cannot be set at run time on elements dynamically created with the createElement method. To create an element with a name attribute, include the attribute and value when using the createElement method.
name属性不能在运行过程中进行变更，只能在创建时指定
2、The NAME attribute cannot be set at run time on elements dynamically created with the createElement method. To create an element with a name attribute, include the attribute and value when using the createElement method.
name属性不能在运行过程中进行变更，只能在创建时指定
