JavaScript³£ÓöÔÏóÏê½â
SCRIPT 񈬀
ÓÃÓÚ°üº¬JavaScript´úÂë.
ÊôÐÔ
LANGUAGE ¶¨Òå½Å±¾ÓïÑÔ
SRC ¶¨ÒåÒ»¸öURLÓÃÒÔÖ¸¶¨ÒÔ.JS½áβµÄÎļþ
window¶ÔÏó
ÿ¸öHTMLÎĵµµÄ¶¥²ã¶ÔÏó.
ÊôÐÔ
frames[] ×ÓèåÊý×é.ÿ¸ö×ÓèåÊý×é°´Ô´ÎĵµÖж¨ÒåµÄ˳Ðò´æ·Å.
feames.length ×Óèå¸öÊý.
self µ±Ç°´°¿Ú.
parent ¸¸´°¿Ú(µ±Ç°´°¿ÚÊÇÖÐÒ»¸ö×Ó´°¿Ú).
top ¶¥²ã´°¿Ú(ÊÇËùÓпɼû´°¿ÚµÄ¸¸´°¿Ú).
status ä¯ÀÀÆ÷״̬´°¿ÚÉϵÄÏûÏ¢.
defaultStatus µ±statusÎÞЧʱ,³öÏÖÔÚä¯ÀÀÆ÷״̬´°¿ÚÉϵÄȱʡÏûÏ¢.
name ÄÚ²¿Ãû,ΪÓÉwindow.open()·½·¨´ò¿ªµÄ´°¿Ú¶¨ÒåµÄÃû×Ö.
·½·¨
alert("message") ÏÔʾº¬Óиø¶¨ÏûÏ¢µÄ"JavaScript Alert"¶Ô»°¿ò.
confirm("message") ÏÔʾº¬Óиø¶¨ÏûÏ¢µÄ"Confirm"¶Ô»°¿ò(ÓÐÒ»¸öOK°´Å¥ºÍÒ»¸öCancel°´Å¥).Èç¹ûÓû§µ¥»÷OK·µ»Øtrue,·ñÔò·µ»Øfalse.
prompt("message") ÏÔʾһ¸ö"prompt"¶Ô»°¿ò,ÒªÇóÓû§¸ù¾ÝÏÔʾÏûÏ¢¸øÓèÏàÓ¦ÊäÈë.
open("URL","name") ´ò¿ªÒ»¸öд°¿Ú,¸øÓèÒ»¸öÖ¸¶¨µÄÃû×Ö.
close() ¹Ø±Õµ±Ç°´°¿Ú.
frame¶ÔÏó
ËüÊÇÕû¸öä¯ÀÀÆ÷´°¿ÚµÄ×Ó´°¿Ú,³ýÁËstatus,defaultStatus,nameÊôÐÔÍâ,ËüÓµÓÐwindow¶ÔÏóµÄÈ«²¿ÊôÐÔ.
location¶ÔÏó
º¬Óе±Ç°URLµÄÐÅÏ¢.
ÊôÐÔ
href Õû¸öURL×Ö·û´®.
protocol º¬ÓÐURLµÚÒ»²¿·ÖµÄ×Ö·û´®,Èçhttp:
host °üº¬ÓÐURLÖÐÖ÷»úÃû:¶Ë¿ÚºÅ²¿·ÖµÄ×Ö·û´®.Èç//www.cenpok.net/server/
hostname °üº¬URLÖÐÖ÷»úÃûµÄ×Ö·û´®.Èçhttp://www.cenpok.net
port °üº¬URLÖпÉÄÜ´æÔڵĶ˿ںÅ×Ö·û´®.
pathname URLÖÐ"/"ÒÔºóµÄ²¿·Ö.Èç~list/index.htm
hash "#"ºÅ(CGI²ÎÊý)Ö®ºóµÄ×Ö·û´®.
search "?"ºÅ(CGI²ÎÊý)Ö®ºóµÄ×Ö·û´®.
document¶ÔÏó
º¬Óе±Ç°ÎĵµÐÅÏ¢µÄ¶ÔÏó.
ÊôÐÔ
title µ±Ç°Îĵµ±êÌâ,Èç¹û䶨Òå,Ôò°üº¬"Untitled".
location ÎĵµµÄÈ«URL.
lastModified º¬ÓÐÎĵµ×îºóÐÞ¸ÄÈÕÆÚ.
r
Ïà¹ØÎĵµ£º
×÷ÓÃÓò Scope
Javascript Öеĺ¯ÊýÊôÓÚ´Ê·¨×÷ÓÃÓò£¬Ò²¾ÍÊÇ˵º¯ÊýÔÚËü±»¶¨ÒåʱµÄ×÷ÓÃÓòÖÐÔËÐжø²»ÊÇÔÚ±»Ö´ÐÐʱµÄ×÷ÓÃÓòÄÚÔËÐС£ÕâÊÇϬţÊéÉϵÄ˵·¨¡£µ«“¶¨Òåʱ”ºÍ“Ö´ÐУ¨±»µ÷Óã©Ê±”ÕâÁ½¸ö¶«Î÷ÓÐЩÈ˸㲻Çå³þ¡£¼òµ¥À´Ëµ£¬Ò»¸öº¯ÊýAÔÚ“¶¨Òåʱ”¾ÍÊÇ function A(){} Õâ¸öÓï¾äÖ´ÐеÄʱºò¾Í ......
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 ......
<script language='javascript'>
function toggleAll(cb)
{
var val = cb.checked;
var frm = document.forms[0];
var len = frm.elements.length;
var i=0;
for( i=0 ; i<len ; i++)
&nb ......
Grouping Scripts ³É×é½Å±¾
Since each <script> tag blocks the page from rendering during initial download, it's helpful to limit the total number of <script> tags contained in the page. This applies to both inline scripts as well as those in external files. Every time ......
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 ......