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

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

ͨ¹ýjavascript»ñµÃurl²ÎÊý

Ò³ÃæÌá½»Êý¾ÝÒ»°ãÓÐÁ½ÖÖ·½·¨£ºget,post¡£post¾ÍÊÇËùνµÄformÌá½»£¬Ê¹ÓÃÊÓͼ£»getÊÇͨ¹ýurlÌá½»¡£
Get·½·¨Ò»°ãÓúǫ́´úÂ루Èçasp,asp.net£©»ñµÃ²ÎÊý£¬´úÂëºÜ¼òµ¥£ºRequest.QueryString["id"];¼´¿É»ñÈ¡¡£ 
ÓÐЩʱºòÐèÒªÖ±½ÓÔÚǰ̨»ñÈ¡url²ÎÊý£¬ÒªÓõ½javascript£¬jsûÓÐÖ±½Ó»ñÈ¡url²ÎÊýµÄ·½·¨£¬ÄÇô£¬ÎÒÃÇÈçºÎͨ¹ýjs ......

[·­Òë]High Performance JavaScript(033)

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 ......

ÓÃJavaScriptдµÄСʱºòÍæµÄƹÅÒÇòСÓÎÏ·

ÓÉÓÚ»ðºüä¯ÀÀÆ÷²»Ö§³Ö“removeNode”º¯Êý£¬ËùÒÔһϴúÂëÖ»Ö§³ÖIE.
<!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>
< ......

JavaScript±à³Ì±Ê¼Ç

ÐÂÖÐ……
1¡¢Êý¾ÝÀàÐÍÑéÖ¤ÎÊÌâ
  Asp.NetËäÈ»ÓÐÑéÖ¤¿Ø¼þ£¬µ«ÊÇÓÐЩ¸´ÔÓµÄÑéÖ¤»¹Êǵô«µ½·þÎñÆ÷ÉϽøÐУ¬ÓÃjsËٶȺÍÐÔÄܶ¼±È½ÏºÃ
<script>
 //¼ì²éÊÇ·ñΪÈÎÒâÊý£¨ÊµÊý£©
function isNumeric(strNumber) {
var newPar=/^(-|\+)?\d+(\.\d+)?$/
alert(newPar.test(strNumber)); }
 //¼ ......

JavaScript ¶ÁÈ¡ JSON


JSON:
[{"subjecttypeId":"1","subjectName":"67","scope":"1",},{"subjecttypeId":"1","subjectName":"345","scope":"1"}]
JavaScript:
       var result = window.eval('(' + JSON+ ')');

for(var p in result){

result[p].subjectName;

alert(result[p] ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ