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Object.extend = function(destination, source) {
  for(property in source) {
     destination[property] = source[property];
  }
  return destination;
}
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Object.prototype.extend = function(object) {
  return Object.extend.apply(this, [this, object]);
}
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Object.extend.apply(this,[this,object]);
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<script language="JavaScript" type="text/javascript">
<!--
//¶¨Òåextend·½·¨
Object.extend = function(destination, source) {
  for (property in source) {
     destination[property] = source[property];
  }
  return destination;
}
Object.prototype.extend = function(object) {
  return Object.extend.apply(this, [this, object]);
}
//¶¨Òåclass1
function class1(){
      //¹¹Ô캯Êý
}
//¶¨ÒåÀàclass1µÄ³ÉÔ±
class1.prototype={
      method:function(){
           alert("class1");
      },
      method2:function(){
           alert("method2");
      }
}
//¶¨Òåclass2
function class2(){
      //¹¹Ô캯Êý
}
//ÈÃclass2¼Ì³ÐÓÚclass1²¢¶¨ÒåгÉÔ±
class2.prototype=(new c