1. ~function(){
    2.     var numObj = {
    3.       isNum:"Number",
    4.       isStr:"String",
    5.       isBoo:"Boolean",
    6.       isNull:"Null",
    7.       isUnd:"Undefined",
    8.       isObj:"Object",
    9.       isAry:"Array",
    10.       isFun:"Function",
    11.       isReg:"RegExp",
    12.       isDate:"Date"
    13.     },isType = function(){
    14.         var outerArg = arguments[0];
    15.         return function(){
    16.             var innerArg = arguments[0],
    17.                 reg = new RegExp("^\\[object"+outerArg+"\\]$","i");
    18.             return reg.test(Object.prototype.toString().call(innerArg));
    19.         }
    20.     };
    21.     var check = {};
    22.     for(var key in numObj){
    23.         if(numObj.hasOwnProperty(key)){
    24.             check[key] = isType(numObj[key]);
    25.         }
    26.     }
    27.     window.$t = window.check = check;
    28. }();
    29. console.log($t.isAry([]));