Javascript¼òÒ×½Ì³Ì 1
¹ØÓÚThis
1. ËüÊÇÒ»¸ö¹Ø¼ü×Ö£¬²¢²»ÊDZäÁ¿Ãû»òÊôÐÔÃû¡£
2. Ëüʵ¼ÊÖ¸functionËù¹ØÁªµÄ¶ÔÏó£¬Èç¹ûfunctionûÓйØÁªÈκζÔÏó£¬ÔòthisÊÇGlobal¶ÔÏó
var msg = 'I am global';
function showMsg(){
alert(this.msg);
};
function nestedShowMsg (){
var nested = function(){
alert(this.msg);
};
nested();
};
var owner = {msg:'I am local'};
owner.showMsg = showMsg;
owner.nestedShowMsg = nestedShowMsg;
showMsg(); //should be 'I am global'
owner.showMsg(); //should be 'I am local'
owner.nestedShowMsg();should be 'I am global'
Ïà¹ØÎĵµ£º
Summary ×ܽá
When web pages or applications begin to feel slow, analyzing assets as they come over the wire and profiling scripts while they are running allows you to focus your optimization efforts where they are needed most.
µ±ÍøÒ³»òÓ¦ÓóÌÐò±äÂýʱ£¬·ÖÎ ......
JavascriptÎļþ¼°Îļþ¼Ð²Ù×÷
Ò»¡¢¹¦ÄÜʵÏÖºËÐÄ£ºFileSystemObject ¶ÔÏó
ÒªÔÚjavascriptÖÐʵÏÖÎļþ²Ù×÷¹¦ÄÜ£¬Ö÷Òª¾ÍÊÇÒÀ¿¿FileSystemobject¶ÔÏó¡£
¶þ¡¢FileSystemObject±à³Ì
ʹÓÃFileSystemObject ¶ÔÏó½øÐбà³ÌºÜ¼òµ¥£¬Ò»°ãÒª¾¹ýÈçϵIJ½Ö裺 ´´½¨FileSystemObject¶ÔÏó¡¢Ó¦ÓÃÏà¹Ø·½·¨¡¢· ......
¡ö´ò¿ª¡ö
<input name=Button onClick=document.all.WebBrowser.ExecWB(1,1) type=button value=´ò¿ª>
<OBJECT classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height=0 id=WebBrowser width=0></OBJECT>
¡öÁí´æÎª¡ö
<input name=Button onClick=document.all.WebBrowser.ExecWB(4,1) typ ......
1. document.write( " "); Êä³öÓï¾ä
2.JSÖеÄ×¢ÊÍΪ//
3.´«Í³µÄHTMLÎĵµË³ÐòÊÇ:document- >html- >(head,body)
4.Ò»¸öä¯ÀÀÆ÷´°¿ÚÖеÄDOM˳ÐòÊÇ:window- >(navigator,screen,history,location,document)
5.µÃµ½±íµ¥ÖÐÔªËØµÄÃû³ÆºÍÖµ:document.getElementById( "±íµ¥ÖÐÔªËØµÄID號 ").name(»òvalue)
6.Ò ......
JavaScriptµÄä¯ÀÀÆ÷¶ÔÏóÏê½â
Ò»¡¢ä¯ÀÀÆ÷¶ÔÏó²ã´Î¼°ÆäÖ÷Òª×÷ÓÃ
¶þ¡¢Îĵµ¶ÔÏó¹¦Äܼ°Æä×÷ÓÃ
Èý¡¢·¶Àý
ʹÓÃä¯ÀÀÆ÷µÄÄÚ²¿¶ÔÏóϵͳ, ¿ÉʵÏÖÓëHTMLÎĵµ½øÐн»»¥¡£ËüµÄ×÷ÓÃÊǽ«Ïà¹ØÔªËØ×éÖ¯°ü×°ÆðÀ´£¬Ìṩ¸ø³ÌÐòÉè¼ÆÈËԱʹÓ㬴Ӷø¼õÇá±à³ÌÈ˵ÄÀͶ¯£¬Ìá¸ßÉè¼ÆWebÒ³ÃæµÄÄÜÁ¦¡£
Ò»¡¢ä¯ÀÀÆ÷¶ÔÏó²ã´Î¼°ÆäÖ ......