parameter 可省略，相當于C#中構造函數參數。 2. 實例化自定義類型 代碼如下: <script type="text/javascript"> function userobject(parameter){ } //myobject is now an object of type userobject! var myobject=new userobject("hi") alert(myobject) </script>
3. 添加屬性 代碼如下: function userobject(parameter){ this.firstproperty=parameter this.secondproperty="This is the second property" }
//使用 代碼如下: <script> var myobject=new userobject("hi there.") //alerts "hi there." alert(myobject.firstproperty) //writes "This is the second property" document.write(myobject.secondproperty) </script>
4.添加方法 （circle類） 代碼如下: //first method function function computearea(){ var area=this.radius*this.radius*3.14 return area } //second method function function computediameter(){ var diameter=this.radius*2 return diameter }
關聯到自定義類型： 代碼如下: <script type="text/javascript"> /*the below creates a new object, and gives it the two methods defined earlier*/ function circle(r){ //property that stores the radius this.radius=r this.area=computearea this.diameter=computediameter } </script>
