Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Javascript±äÁ¿×÷ÓÃÓò

ÇëÏÈ¿´ÏÂÌ⣺
if(true)
{
     a = 1;
}
alert(a);  //Êä³öɶ£¿
if(true)
{
    var a = 1; 
}
alert(a);  //ÕâÓÖÊä³öʲô£¿
ÔÚfirefox3.5Ï£¬µÚÒ»¸öÊä³ö1;µÚ¶þ¸öÊä³öundefined£¡£¡£¡
ÎªÉ¶ÄØ£¿ºÇºÇ£¬±¾ÈËÔڴ˰àÃÅŪ¸«Ò»Ï£º
Ò»°ãÇé¿öÏÂȱʡvarÉùÃ÷ʱ£¬Ä¬ÈϸñäÁ¿ÎªÈ«¾Ö±äÁ¿¡£Á˽âÕâ¾ä»°£¬ËùÓÐÎÊÌâÒ²¾ÍÓ­Èжø½âÁË£¡ºÇºÇ£¡
µÚÒ»µÀÌ⣺±äÁ¿aȱʡvarÉùÃ÷£¬¶øÖ±½ÓʹÓ㬹ʶøÄ¬ÈÏΪȫ¾Ö±äÁ¿£¬Êä³ö1
µÚ¶þµÀÌ⣺±äÁ¿a£¬ÔÚif¿éÖÐvarÉùÃ÷£¬Êô¾Ö²¿±äÁ¿£¬Êä³öundefined£¡


Ïà¹ØÎĵµ£º

JavaScript ¹¹Ô캯Êý myhere

/**
* JavaScript ÊÇÃæÏò¶ÔÏóµÄÓïÑÔ£¬µ«ÊÇËûµÄÃæÏò¶ÔÏó²»ÊÇ»ùÓÚÀàµÄ£¬ÊÇ»ùÓÚÔ­Ð͵Ä;
* µ«ÊÇËûµÄÒ»Ð©ÌØÐÔ(º¯ÊýÊÇÊý¾Ý)£¬Ê¹µÃËü¿ÉÒÔÄ£Äâ»ùÓÚÀàµÄÃæÏò¶ÔÏ󣬵«ÊÇ JavaScript ²¢²»Ö§³ÖºÍ Java Ò»ÑùµÄÀ࣬
* Òò´Ë JavaScript ÖеÄ"Àà"¿ÉÒÔ³Æ×÷"αÀà"
*/
//
/**
* ¹¹Ô캯Êý: js ÖÐÓÃÀ´ºÍ new ÔËËã·ûÒ»ÆðʹÓõĺ¯Êý³Æ× ......

Javascriptµ¼³öExcel

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; ......

ÓÉdzµ½ÉîÁ˽âJavaScriptÀà

ÀàÊÇʲô£¿
    
   Ðí¶à¸Õ½Ó´¥±à³ÌµÄÅóÓѶ¼¿ÉÄÜÀí½â²»ÁËÀ࣬ÆäʵÀàÊǶÔÎÒÃÇÕâ¸öÏÖʵÊÀ½çµÄÄ£Ä⣬°ÑËü˵³É“Àà±ð”»òÕß“ÀàÐÍ”¿ÉÄÜ»á¸üÈÝÒ×Àí½âһЩ¡£±ÈÈç“ÈË”ÕâÖÖ¶¯
Îï¾ÍÊÇÒ»¸öÀ࣬¶ø¾ßÌåijһ¸öÈ˾ÍÊÇ“ÈË”Õâ¸öÀàµÄÒ»¸öʵÀý
£¬
“È ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ