根据包名，在指定空间中创建对象

 1 function namespace(oNamespace, sPackage) {
 2     var package = sPackage.split(‘.‘);
 3     var obj = oNamespace;
 4     for(var i = 0; i < package.length; i++){
 5         if(typeof obj[package[i]] !== ‘object‘){
 6             obj[package[i]] = {};
 7         }
 8         obj = obj[package[i]] ;
 9     }
10     return oNamespace;
11 }