Question

我正在用JavaScript编写一个浏览器游戏，需要创建一个Card Class。此类具有（带有其他变量）图像，应在创建对象时显示该图像。如何在单击图像时显示对象的图像并调用函数？

使用此代码，我可以在任何地方显示图像，但是当我打开.htm文件而不是单击图像时，会立即调用OnClick函数。

<html>
<head> </head>
<body>
<script type="text/javascript">      
  function Card(photo){ // this is my object
      this.randomVariable=42;
      this.pic = new Image(); // creating an Image object inside my Card class.
        this.pic.src=photo;
        this.pic.height = 300;
        this.pic.width = 200;
        this.pic.style.position="absolute";  // this 3 lines should set the image's position, and it does.
        this.pic.style.top = 50 + "px"; 
        this.pic.style.left = 50 + "px";
        this.OnClick = document.write("lala");
  }

  var myObject = new Card("cardback.jpg");
  myObject = document.body.appendChild(coso1.pic); // is this how I should create the image? It appears where I want, but it doesn't seem a "clean" programming.
  myObject.OnClick = document.write("lala" + coso1.pic.offsetLeft + coso1.pic.offsetTop); // this is casted when I open the file, and not when I click on the image. *sadface*

</script>
</body>
</html>

请帮助检测我何时点击图像并以较不脏的方式显示图像（如果可能的话）？

提前致谢！

Answer 1

http://jsfiddle.net/CTWWk/1/

var image = new Image();
image.src = 'https://www.google.co.il/images/srpr/logo4w.png';

image.onclick = function(){
      alert('I Clicked an image now !');  
};

var divy = document.getElementById('divy');
divy.appendChild(image);

Answer 2

对您的代码进行了一些更改。希望它有所帮助！

<html>
<head> </head>
<body>
<script type="text/javascript">    
  function Card(photo){
     var cardInstance = new Image();
     cardInstance.src = photo;
     cardInstance.addEventListener('click', function (e) {
          alert(1);
      });
     return cardInstance;
  }  

  var myObject = new Card("cardback.jpg");
  document.body.appendChild(myObject);

</script>
</body>
</html>

JavaScript - 单击图像

2 个答案: