原生js封装type

//封装type
		
封装type
		function type(a){

			if(a===null){
				return "null";

			}else if(typeof(a)=='object'){
				//数组，对象，包装类---》"object"
				if(Object.prototype.toString.call(a)=="[object Array]"){
					return "Array";
				}
				else if(Object.prototype.toString.call(a)=="[object Object]"){
					return "Object";
				}else if(Object.prototype.toString.call(a)=="[object Number]"){
					return "object-Number";
				}else if(Object.prototype.toString.call(a)=="[object String]"){
					return "object-String";
				}else if(Object.prototype.toString.call(a)=="[object Boolean]"){
					return "object-Boolean";
				}
				

			}else{
				return typeof(a);//number, String, function ,undefined ,boolean
			}



		}