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JavaScript »ñȡʼþ¶ÔÏóµÄÒ»¸ö×¢Òâµã
2009-7-24 ÉÏÎç
- JS/Ajax/AS/Flex
- event
- javascript
  
ƽʱÎÒÃÇ»ñȡʼþ¶ÔÏóÒ»°ãд·¨ÈçÏ£º
function
getEvent
(
event
)

{
   
return

event

||
window
.
event
 
// IE:window.event
}
Èç¹ûûÓвÎÊý£¬Ò²¿Éд³É£¨·ÇIE £ºÊ¼þ¶ÔÏó»á×Ô¶¯´«µÝ¸ø¶ÔÓ¦µÄʼþ´¦Àíº¯Êý£¬ÇÒΪµÚÒ»¸ö²ÎÊý£©£º
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
£¬ÎªÊ²Ã´ÄØ£¿
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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