js原型鏈demo

Function.prototype.method = function(funcName,callBack){
        this.prototype[funcName] =  callBack;
        return this;

}

Number.method("integer",function(){

return Math[this > 0 ? "ceil" : "floor"](this);
});

String.method("trim",function(){

return this.replace(/^\s+|\s+$/);

});