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JavaScript »ñȡʼþ¶ÔÏóµÄÒ»¸ö×¢Òâµã 
2009-7-24 ÉÏÎç 
- JS/Ajax/AS/Flex
 - event
 - javascript
  
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function
 getEvent
(
event
)
 
{
    
return
 
event
 
||
 window
.
event
  
// IE:window.event
}
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function
 getEvent
()
 
{
    
return
 arguments
[
0
]
 
||
 window
.
event
 
// IE:window.event
}
ÕâÑùµÄд·¨ÔÚ³ý Firefox£¨²âÊÔ°æ±¾£º3.0.12£¬ÏÂͬ£© ÍâµÄä¯ÀÀÆ÷ÉÏÔËÐж¼²»»áÓÐÎÊÌ⣬µ« Firefox 
ΪʲôÀýÍâÄØ£¿ÈÃÎÒÃÇÕâÑùÒ»ÖÖÇéÐΣº
<button 
id
=
"btn"
 
onclick
=
"
foo
()
"
>
°´Å¥
</button>
<script>
function
 foo
(){
   
var
 e 
=
  getEvent
();
   alert
(
e
);
}
</script>
ÔËÐнá¹ûÔÚ Firefox ÖÐÊÇ undefined
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ÔÚ Firefox Öе÷ÓÃÆäʵÊÇÕâÑùµÄ£¬Ïȵ÷ÓÃÖ´ÐеÄÊÇ£º
function
 onclick
(
event
)
 
{
    foo
();
}
È»ºóµ÷ÓÃÖ´ÐеÄÊÇ£º
function
 foo
(){
   
var
 e 
=
  getEvent
();
   alert
(
e
);
}
»á·¢ÏÖÔÚ Firefox Ï onclick
=
"foo()"
 ÖÐµÄ foo
()
 ÎÞ·¨×Ô¶¯´«Èëʼþ¶ÔÏó²ÎÊý£¬¶øÄ¬ÈÏ´«µÝ¸øÁËϵͳÉú³ÉµÄ 
onclick º¯Êý£¬ÄDZ¾ÀýÎÒÃÇ¿ÉÒÔͨ¹ý getEvent
.
caller
.
caller
.
arguments
[
0
]
 »ñµÃʼþ¶ÔÏó¡£
Òò´Ë£¬ÎÒÃÇµÄ getEvent ¿ÉÒÔÓÅ»¯³É£¨²ÎÕÕ yui_2.7.0b ÖÐµÄ event/event-debug.js ÖÐ getEvent 
·½·¨£©£º
function
 getEvent
(
event
)
 
{
    
var
 ev 
=
 
event
 
||
 window
.
event
;
    
if
 
(!
ev
)
 
{
        
var
 c 
=
 
this
.
getEvent
.
caller
;
        
while
 
(
c
)
 
{
            ev 
=
 c
.
arguments
[
0
];
            
if
 
(
ev 
&&
 
(
Event
 
==
 ev
.
constructor
 
||
 
MouseEvent
  
==
 ev
.
    
     
	
	
    
    
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