javascript正规表达式替换问题 400 请求报错 

var config = {title:'aa',onclick:function(){},items:[{button:{onclick:function(){}}}]},
		handler = function(config){
			for (var o in config){
				if (!config.hasOwnProperty(o)) {
					console.log('ignore %o => %o of %o', o, config[o], Object.prototype.toString.apply(config[o]));
					continue;
				}else if (config[o] && Object.prototype.toString.apply(config[o]) === '[object Function]') {
					console.log('delete %o => %o of %o', o, config[o], Object.prototype.toString.apply(config[o]));
					delete config[o];
				}else if (Object.prototype.toString.apply(config[o]) === '[object Array]' || Object.prototype.toString.apply(config[o]) === '[object Object]') {
					console.log('enter %o => %o of %o', o, config[o], Object.prototype.toString.apply(config[o]));
					handler(config[o]);
					console.log('return %o => %o of %o', o, config[o], Object.prototype.toString.apply(config[o]));
				}else console.log('ignore %o => %o of %o', o, config[o], Object.prototype.toString.apply(config[o]));
			}
		};
handler(config);
/*
结果
ignore "title" => "aa" of "[object String]"
delete "onclick" => function (){} of "[object Function]"
enter "items" => [Object] of "[object Array]"
enter "0" => Object of "[object Object]"
enter "button" => Object of "[object Object]"
delete "onclick" => function (){} of "[object Function]"
return "button" => Object of "[object Object]"
return "0" => Object of "[object Object]"
return "items" => [Object] of "[object Array]"
*/