JavaScriptѧϰ±Ê¼Ç£¨Î壩
1.ÔÚHTMLÖÐʹÓÃ<script>ÔªËØÒýÈëJavaScript¡£
¸ÃÔªËØÓÐÁ½¸öÊôÐÔ£¬languageÉùÃ÷ҪʹÓõĽű¾ÓïÑÔ£¬srcÊôÐÔÊÇ¿ÉÑ¡µÄ£¬ÓÃÓÚÒýÓÃÍⲿJavaScriptÎļþ¡£
NB
£ºÏÖÔÚ´ó¶àʹÓÃtypeÊôÐÔ£¨type=“text/javascript”£©Ìæ´úlanguageÊôÐÔ£¬ÒÔ±ã¸üºÃµØÖ§³ÖXHTML£¨¿ÉÀ©Õ¹HTML£©¡£
2.Ò»°ãÈÏΪ£¬´óÁ¿µÄJavaScript´úÂë²»Ó¦ÄÚǶÔÚHTMLÎļþÖУ¬ÔÒòÈçÏ£º
°²È«ÐÔ£ºÊ¹ÓÃÍⲿÒýÓÿÉÒÔÔÚÓû§²é¿´Ò³ÃæÔ´´úÂëʱÒþ²Øjavas´úÂë
´úÂëά»¤£º°ÑËùÓÐJavaScriptÎļþ·ÅÔÚÒ»¸öĿ¼ÖиüÈÝÒ×ά»¤
»º´æ£º¶ÔÍⲿJavaScriptÎļþµÄ¸´ÓüõСÁËÒ³Ãæ´óС£¬¼Ó¿ìÁË»º´æËÙ¶È
3.Ò»°ã˵À´£¬ËùÓÐJavaScript´úÂë¶¼ÔÚ<head>ÔªËØÖС£Î¨Ò»¸Ã³öÏÖÔÚ<body>ÔªËØÖеÄÊǵ÷ÓÃÇ°Ãæ¶¨ÒåµÄº¯Êý£¬µ«²»½¨ÒéÕâÖÖµ÷Ó÷½Ê½¡£ÔÚ<body>ÔªËØÖÐÖ»½¨ÒéʹÓÃʼþ´¦Àíº¯Êý¡£
4.HTMLÖеÄ<noscript>ÔªËØÖеÄÄÚÈÝ£¬¶ÔÓÚÖ§³Ö»òÆôÓÃJavaScriptµÄä¯ÀÀÆ÷»áºöÂÔ£¬¶ø²»Ö§³Ö»ò½ûÓÃJavaScriptµÄä¯ÀÀÆ÷ÔòÏÔʾ¡£
ËùÒÔÓÃ<noscript>ÔªËØÏÔʾJavaScript²»ÄÜÓÃʱӦ¸ÃÏÔʾµÄÄÚÈÝ£¬ÊÇÒ»Öֺܺõķ½·¨¡£
5.¶ÔÓÚXHTML£¬²»ÄÜÖ±½ÓʹÓÃÌØÊâ×Ö·ûÈç"<",">","&"¡£Òò´Ë£¬ÎªÁËÔöÇ¿JavaScript´úÂëµÄ¿É¶ÁÐÔ£¬Ó¦Ê¹ÓÃCDATA¶Î£º
<script type="text/javascript">
//<![CDATA[ //ÕâÀï¼Ó˫б¸Ü½«CDATA¶Î×¢ÊÍÆðÀ´ÊÇÔÒòÊDz¢²»ÊÇËùÓÐä¯ÀÀÆ÷¶¼Ö§³ÖXHTML
……………… //JavaScript´úÂë
//]]>
</script>
NB
£ºÎª±ÜÃâCDATAÎÊÌ⣬×îºÃ»¹ÊÇÓÃÍⲿÎļþ·½Ê½ÒýÈëJavaScript´úÂë¡£
6.BOM
window¶ÔÏóÊÇÕû¸öBOMµÄºËÐÄ¡£
window¶ÔÏó±íʾÕû¸öä¯ÀÀÆ÷´°¿Ú£¬µ«²»±Ø±íʾÆäÖаüº¬µÄÄÚÈÝ£¨ÕâÖ÷ÒªÓÉdocument¸ºÔ𣩡£
alert()·½·¨¼´ÊôÓÚwindow¶ÔÏó¡£
confirm()·½·¨£ºµ¯³öÒ»¸öÓГok”ºÍ“cancel”Á½¸öÑ¡ÏîµÄ¶Ô»°¿ò£¬Èç¹ûÑ¡Ôñ“ok”£¬Ôòconfirm()·µ»Øtrue£¬·ñÔò·µ»Øfalse¡£
prompt()·½·¨£ºµ¯³öÒ»¸ö¿ÉÒÔÊäÈëÎı¾µÄ¶Ô»°¿ò¡£
Ïà¹ØÎĵµ£º
1£®ÈçºÎ»ñÈ¡±íµ¥<select>ÓòµÄÑ¡Ôñ²¿·ÖµÄÎı¾£¿
<form name="a">
<select name="a" size="1" onchange="_sel(this)">
<option value="a">1</option>
<option value="b">2</option>
<option value="c">3</option>
< ......
<script language="javascript" type=text/javascript>
var fso;
fso = new ActiveXObject("Scripting.FileSystemObject");
function SystemSpecialFolder(Special)
{
var tfolder, TemporaryFolder = Special;//0: Windows ²Ù×÷ϵͳ°²×°µÄÎļþ;1:°üº¬¿â¡¢×ÖÌ壬ÒÔ¼°É豸Çý¶¯³ÌÐòµÄ System Î ......
javascriptÄÚ´æÐ¹Â¶µÄÎÊÌâÒ»Ö±ÒÔÀ´¶¼²»Êܵ½´ó¼ÒµÄÖØÊÓ£¬ÔÒòÊǶÔÓû§µÄÓ°ÏìûÓÐ̫ʵ¼ÊµÄ±íÏÖ£¬»òÐí½ü¼¸ÄêÄڴ淢չѸËÙ¡£½Å±¾ÄÚ´æÔÙй¶Ҳ²»»áÓÐÌ«´óÓ°Ïì¡£
µ±È»×÷Ϊǰ¶Ë¿ª·¢µÄͬѧÃÇ£¬¾Í²»ÄÜÓÐÕâÑùµÄ½ÄÐÒÐÄÀí¡£³öÏÖmemory leaksºÜ´ó³Ì¶ÈÉÏÊÇÒòΪ³ÌÐòµÄ²»³ÉÊìºÍ±àÂ벻̫¹æ·¶Ôì³ÉµÄ¡£²»¹ý£¬ÕâÀï¾Í²»ËµÈçºÎ³öÏÖÎÊÌâµÄ£¬¶ÔÎÊ ......