1.关于prototype:这里prototype是javascript的一个特性，不是那个有名的prototype框架:
<script type="text/javascript">
var string="hello world";
try{
alert(string.phone());
}catch(e){alert(e);}
String.prototype.phone=function()
{
return "159-10957151";
}
alert(string.phone());
</script>
2.关于变量作用域,和IE,firefox对js的不同处理，这里有几个例子，有几个是原来从别处看到的记的笔记，有的是我自己挖掘出来的.
2.1
<script type="text/javascript">
var deep_thought = {
the_answer: 42,
ask_question: function () {
return this.the_answer;
}
};
var the_meaning = deep_thought.ask_question();
alert(the_meaning);
</script>
2.2
<script type="text/javascript">
function test_this() {
return this;
}
var i_wonder_what_this_is = test_this();
alert(i_wonder_what_this_is);
// result: [object window];
</script>
2.3:
<script type="text/javascript">
function click_handler() {
alert(this); // 弹出 window 对象
}
</script>
...
<button id=''thebutton'' onclick=''click_handler()''>Click me!</button>
2.4
<script type="text/javascript">
function click_handler(obj) {
alert(obj);
//result:[object HTMLButtonElement]
}
</script>
...
<button id=''thebutton'' onclick=''click_handler(this)''>Click me!</button>
2.5
<button id=''thebutton'' onclick=''click_handler(this)''>Click me!</button>
<script type="text/javascript">
function BigComputer(answer) {
this.the_answer = answer;
this.ask_question = function () {
alert(this.the_answer);
}
}
function addhandler() {
var deep_thought = new BigComputer(42),
the_button = docu |
