类型检测

    /*类型检测*/
    var isType = function (obj, type) {
        return Object.prototype.toString.call(obj) === "[object " + type + "]";
    }
    //console.log(isType([],"Array"));
    //console.log(isType(1,"Number"));
    //console.log(isType("","String"));
    //console.log(isType(new Date(),"Date"));
    //console.log(isType(function(){},"Function"));
    //console.log(isType(new RegExp(),"RegExp"));
    //console.log(isType({},"Object"));
    //console.log(isType(true,"Boolean"));
    //console.log(isType(null,"Null"));
    //console.log(isType(undefined,"Undefined"));