1 function cloneObject( obj ) { 2         var str = ‘‘; 3         var newObj = obj.constructor === Array ? [] : {}; 4  5         if ( typeof obj !== ‘object‘) { 6             return ; 7         } else if( window.JSON) { 8             str = JSON.stringify(obj); 9             newObj = JSON.parse(str);10         } else {11             for ( var i in obj ) {12                 newObj[i] = typeof obj[i] === ‘ object ‘ ? arguments.callee.call( obj[i] ) : obj[i];13             }14         }15         return newObj;16     }17 18 //for test19 var p = [1, ‘2‘, [0, 1, 2], {a: 0, b: 1, c: 2}];20 //clone21 var np = cloneObject(p);22  console.log(obj, arr, newobj, newarr, np);