¼ÙÈçä¯ÀÀÆ÷À뿪ÁËJavaScript [ µËÙ© ] ÓÚ:2009 05 10
¼ÙÈçä¯ÀÀÆ÷À뿪ÁËJavaScript
¼ÙÈçä¯ÀÀÆ÷À뿪ÁË JavaScript£¬ÄÇô»¥ÁªÍøÉϾø´ó¶àÊýÍøÒ³¾ÍÎÞ·¨Õ¹Ê¾¡£µ«ÊǼ¤½øµÄÖ÷ÕŲ¢·ÇÒ»ÎÞÊÇ´¦£¬ÖÁÉÙËüÄÜ·ñ´Ù½øÎÒÃǶÔÊìÊÓÎ޶õÄÊÂÎ»»Ò»¸ö½Ç¶È×ö½øÒ»²½Ë¼¿¼¡£¼ÙÈçÓÃJavaÌæ»»JavaScript£¬»áÓÐʲôºÃ´¦£¿ºÃ´¦»òÐíÓÐÈý¸ö²ãÃæ£¬¶ÔÓÚÊÖ»úÓ¦ÓöøÑÔ£¬ÕâЩÓŵãÓÈÆä¿É¹ó¡£
1. Ô¤ÏȱàÒ룬ʼþÏìÓ¦ËÙ¶È¿ì
JavaScriptÖ®ËùÒÔ±»¹ã·ºÓ¦ÓÃÔÚÍøÒ³Éè¼ÆÖУ¬Ò»¸öÖØÒªÔÒòÊÇËüÄܹ»²¶×½Ê¼þ£¬²¢ÏàÓ¦´¦Àí¡£Æ©Èç¿´ÏÂÃæÒ»¶Î¼ò¶ÌµÄʵÀý£¬
<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¡£
´¦ÀíʼþµÄ´úÂë²»Ò»¶¨·ÇÒªÓÃJavaScript²»¿É£¬Æ©ÈçÔÚ΢ÈíIEä¯ÀÀÆ÷À¿ÉÒÔÓÃVBScript¡£Èç¹ûÉһÏ£¬²»Óà JavaScript£¬VBScriptµÈµÈ½Å±¾ÓïÑÔ£¬¶øÖ±½ÓÓÃJava£¬C/C++µÈµÈ¸ß¼¶ÓïÑÔ£¬È¥ÊµÏÖfocusEventHanderÕâÑùµÄʼþ´¦ÀíÂß¼£¬ÊÇ·ñ¿ÉÐУ¿ÀíÂÛÉÏÊÇ¿ÉÐе쬵«ÊÇĿǰµÄʵ¼ÊÇé¿öÊÇ£¬´ó¶àÊýä¯ÀÀÆ÷²»Ö§³Ö¡£²»Ö§³ÖµÄÔÒò£¬²¢·ÇÊÇÒòΪ¼¼ÊõÉÏÄÑÒÔʵÏÖ£¬ÊÂʵÉÏ£¬Èç¹û¸Ä±äÒ»ÏÂä¯ÀÀÆ÷µÄÔ´Â룬Õâ¸öÄ¿±ê²¢²»ÄÑʵÏÖ¡£²»Ö§³ÖµÄÔÒòÖ÷ÒªÊdzöÓÚÉÌÎñÉϵĿ¼ÂÇ£¬ÏêÇé²ÎÔÄǰÁ½½ÚÎÄÕ¡£
¼ÙÈçÓÃJavaÕâÑùµÄ¸ß¼¶ÓïÑÔÌæ´úJavaScriptÕâÑùµÄ½Å±¾ÓïÑÔ£¬È¥ÏìÓ¦ºÍ´¦Àíä¯ÀÀÆ÷ʼþ£¬ÔÚͨ³£Çé¿öÏ£¬Óû§ÌåÑé²»Ò»¶¨»áÓÐÃ÷ÏÔ¸ÄÉÆ¡£µ«ÊǶÔÓÚ´¦ÀíÂß¼Ï൱¸´ÔÓµÄÇé¾°£¬Óà Java»áʹʼþµÄÏìÓ¦´¦ÀíËÙ¶È´ó´óÌá¸ß¡£Æ©ÈçÓÐÐ©ÍøÒ³£¬ÔÚ´ò¿ªÇ°»áÔ¤ÏÈloadingÒ»¶Îʱ¼ä¡£Ëùνloading£¬Í¨³£ÊǶÔÍøÒ³¸½´øµÄ JavaScript×öJIT±àÒë¡£Ïà±È֮ϣ¬JavaÖ®ËùÒÔ±ÈJavaScript·´Ó¦ËÙ¶È¿ì
Ïà¹ØÎĵµ£º
±¾ÎÄÖ÷ÒªÊdzöÓÚÓÐÅóÓÑʹÓÃÎÒÔÀ´Ð´µÄautocompleteµÄJS¿Ø¼þ¡£µ±Êý¾ÝÁ¿´óµÄʱºò£¬»á³öÏÖЧÂʼ«ÆäÂýµÄÇé¿ö£¬ÎÒÔÚÕâ¶Îʱ¼ä×ö³öµÄһЩ²âÊÔÒ²¼°Ò»Ð©¾Ñ飬Óë´ó¼Ò·ÖÏí£¬Èç¹ûÓдíµÄµØ·½£¬»¹ÇëÖ¸³ö¡£
¾¹ý²âÊÔ£¬ÎÒÃǻᷢÏÖÈçϵÄÇé¿ö»òÕß˵µÄ½áÂÛ£¬Èç¹ûÄúµÄ²âÊÔ½á¹ûÓëÎҵIJ»·û£¬Çë˵Ã÷ÔÒò£¬ÒÔ±ãÏ໥ѧϰ¡£
1£©µ±Ò»¸ö½Ï´óµÄHTML×Ö· ......
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 ......
¿´ÊéµÄʱºòÓöµ½ÕâÑùÒ»¸öÎÊÌ⣬³ÌÐò´úÂëÈçÏÂ
var ob = function(){
var obj = this;
function fn1(){
alert( obj === window );//false
alert( this === window );//ture
}
this.fn2 = function() {
fn1();
}
}
µ±Ê±ºÜ²»Ã÷°×fn1ÀïÃæµÚ¶þ¸öalertµÄ½á¹û£¬Îª ......
´ÓÕâÆªÆð£¬»áÓÉdzµ½ÉîµÄ·ÖÎöjs OO֮дÀ෽ʽ£¬´ó¸Å»áÓÐ5-8ƪ¡£ºóÃæÂ½Ðø»á·ÖÎöÁ÷Ðп⣨¿ò¼Ü£©µÄдÀ෽ʽ¡£ÎªÁËÌÖÂ۵ĵ¥Ò»ÐÔ£¬Ôݲ»¿¼ÂÇÀàµÄ¼Ì³Ð£¬(˽ÓÐ,Êܱ£»¤)ÊôÐÔ»ò·½·¨¡£
EMCA262¹æ·¶ÖÐûÓÐÀà(class)µÄ¸ÅÄjsµÄnewÖ»ÊÇÈÃËû¿´ÆðÀ´¸üÏñc++,javaÒ»µã¡£ÕâÀï˵µÄдÀֻ࣬ÊÇÊéдjs´úÂë·ç¸ñ¶øÒÑ¡£
1¡¢¹¹Ô캯Êý·½Ê½
/**
* P ......
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 ......