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<html>
   <head>
      <script type="text/javascript">
         function focusEventHandler(x) {
            document.getElementById(x).style.background="yellow";
         }
      </script>
   </head>
   <body>
      <p> Focus here, see the color changed to yellow: </p>
         <input type="text" onfocus="focusEventHandler(this.id)" id="fname">
    </body>
</html>
ÔÚÕâ¸öÀý×ÓÖУ¬“onfocus”Ö¸µÄÊǵ±Óû§ÔÚÊäÈë¿òÖеã»÷Êó±êµÄʼþ£¬¶ø“focusEventHandler(this.id)” Ö¸µÄÊÇ´¦ÀíÕâ¸öʼþµÄÏàÓ¦µÄJavaScript´úÂë¡£
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javascriptÖÐevent.keycode

javascriptÖÐevent.keycode
 keycode 8 = BackSpace BackSpace
keycode 9 = Tab Tab
keycode 12 = Clear
keycode 13 = Enter
keycode 16 = Shift_L
keycode 17 = Control_L
keycode 18 = Alt_L
keycode 19 = Pause
keycode 20 = Caps_Lock
keycode 27 = Escape Escape
keycode 32 = space space ......

Ò»¼ÒÖ®ÑÔ£ºËµËµ JavaScript µÄÀà³ÉÔ±µÄ·ÃÎÊ¿ØÖÆ

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var ob = function(){
var obj = this;
function fn1(){
alert( obj === window );//false
alert( this === window );//ture
}
this.fn2 = function() {
fn1();
}

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/**
* P ......

[·­Òë]High Performance JavaScript(004)

XMLHttpRequest Script Injection  XHR½Å±¾×¢Èë
    Another approach to nonblocking scripts is to retrieve the JavaScript code using an XMLHttpRequest (XHR) object and then inject the script into the page. This technique involves creating an XHR object, downloading the JavaScript f ......
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