对象深拷贝deepCopy

　　　　　function type(obj){
		return Object.prototype.toString.call(obj).slice(8,-1);
	}
	function deepCopy(target,cloneObj){
		var copy;
		for(var i in cloneObj){
			
			copy = cloneObj[i];//1、i:a copy:{c:'c'}
							   //3、i:c  'c'
			
			if(target === copy){//防止无限引用	
				continue;
			}
			if(type(copy) === "Array"){
				//target[i] || [] 如果同名的有则在同名下进行添加，如果没有则变为[]
				
				target[i] = arguments.callee(target[i] || [],copy);
			}else if(type(copy) === "Object"){
				//2、target[i]:{ d:'d' } ( { d:'d' }, {c:'c'} )递归
				target[i] = arguments.callee(target[i] || {},copy);
			}else{
				
				target[i] = copy;
				//4、{ d:'d' }[c] = 'c';即{ d:'d',c:'c' }
			}
		}
		return target;
	}
	
	var a = {
		a:{ c:"c" },
		b:"b"
	}

	var obj1 = {
		a:{ d:'d' }
	}

	var t = deepCopy( obj1, a );
	console.log( t );