JavaScript对象继承问题

嗨，请耐心等待。我是一名PHP开发人员，正在进入javaScript的世界。现在我正在构建一个包含不同大小块的网格。我想要一个包含所有方法的基块，然后是其他扩展它（使用它的方法）但具有不同属性的块。我读了很多书，但似乎找不到一个连贯的方法。我已经编写了一些代码，我认为它可以工作，但它不起作用。示例中的SmallBlock有自己的属性，但没有任何Blocks属性

    // Simple extend function to add for creating object inheritance
    function extend(Child, Parent) {
        var Temp = function(){
            Temp.prototype = Parent.prototype;
            Child.prototype = new Temp();
            Child.prototype.constructor = new Child();
        }
    }
    //__________________________________________________
    // ## OBJECT DECLARATIONS  ##
    //__________________________________________________
    //__________________________________________________
    // ## BLOCK ##
    // Base object representing a block/tile in the grid
    var Block = function(){
        // The X position block
        this.positionX = 0;
        // The Y position block
        this.positionY = 0;
        // The height of the block
        this.height = 0;
        // The width of the block
        this.width = 0;
        // The horizontal orientation of a block
        this.blockHorizontalOrientation = null;
        // The vertical orientation of a block
        this.blockVerticalOrientation = null;
        // Method to set the width of a block
        this.setWidth = function(width){
            this.width = width;
        };
        // Method to set the height of a block
        this.setHeight = function(height){
            this.height = height;
        };
        // Method to get the width of a block
        this.getWidth = function(){
            return this.width;
        };
        // Method to get the height of a block
        this.getHeight = function(){
            return this.height;
        };
        // Method to set the X position of a block (in the grid)
        this.setPosX =  function(posX){
            this.positionX = posX;
        };
        // Method to set the Y position of the block (in the grid)
        this.setPosY = function(posY){
            this.positionY = posY;
        };
        // Method to get the Y position of the clock
        this.getPosY = function(){
            return this.positionY;
        };
        // Method to get the X position of the clock
        this.getPosX = function(){
            return this.positionX;
        };
        // Method to get the horizontal orientation
        this.getHOrientation = function(){
            return this.blockHorizontalOrientation;
        };
        // Method to get the vertical orientation
        this.getVOrientation = function(){
            return this.blockVerticalOrientation;
        };
        // Method to get the horizontal orientation
        this.setHOrientation = function(hOren){
            this.blockHorizontalOrientation = hOren;
        };
        // Method to get the vertical orientation
        this.setVOrientation = function(vOren){
            this.blockVerticalOrientation = vOren;
        };
    }
    //__________________________________________________
    // ## SMALL BLOCK ##
    // object representing a small block/tile in the grid -- extends Block
    var BlockSmall = function(){
        // The X position block
        this.positionX = 0;
        // The Y position block
        this.positionY = 0;
        // The height of the block
        this.height = 1;
        // The width of the block
        this.width = 1;
        // The horizontal orientation of a block
        this.blockHorizontalOrientation = null;
        // The vertical orientation of a block
        this.blockVerticalOrientation = null;
    };
    // EXTENDING BLOCK
    extend(BlockSmall, Block);

请有人审查一下这个代码，并通过建议我做错了什么来提供帮助。如果我在外地，请耐心等待。这对我来说都是全新的概念。