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

javascript prototype

 
ÏÂÃæ¶¼ÊǸöÈËÀí½âÒÔ¼°²éÕÒµÄÍøÉϵÄ×ÊÁÏ,ÈçÓв»¶ÔµÄµØ·½ÇëÖ¸Õý
prototype
prototypeÔÚÕâÀïÊÇÔ­Ð͵ÄÒâ˼,²»ÊÇÖ¸ÄǸö¿ò¼Ü...
ÿ¸öº¯Êý¾ÍÊÇÒ»¸ö¶ÔÏó£¨Function£©£¬µ±º¯Êý±»½âÎöºó»áÌí¼ÓÒ»¸öprototypeµÄ¶ÔÏó,È»ºóprototype»áÌí¼ÓÒ»¸öconstructorµÄÊôÐÔ
ËüÖ¸ÏòÄǸöº¯ÊýµÄ
±ÈÈ綨ÒåÒ»¸öfunction test(){}
Ëü»á×Ô¶¯Ìí¼ÓÒ»¸öprototype ; ¼´test.prototype={}
 È»ºó prototype»á×Ô¶¯Ìí¼ÓÒ»¸ötest.prototype.constructor =test  ËüÊÇÖ¸Ï뺯Êý±¾ÉíµÄ
¿ÉÒÔ²âÊÔһϠÀý×ÓÈçÏÂ
function test(){
alert('a');
}
alert(test.prototype); //¿ÉÒÔ¿´³öÊÇobj
test.prototype.constructor(); //¿ÉÒÔ¿´³öÊÇÖ´ÐÐÁËtest

Ò»¸öÀà,ÈçºÎʵÀý»¯³ÉÒ»¸ö¶ÔÏóÁË,ÀàÀïÃæµÄprototypeÀïµÄÊôÐÔÓÖÊÇÔõô³ÉΪʵÀýÀïÃæµÄÊôÐÔµÄÁË
ÕâÀï²»µÃ²»ËµÒ»ÏÂnew µÄ¹ý³Ì
´ó¸Å¿ÉÒÔ·Ö³É3²½
Õâ¸öÀý×Ó¿ÉÕæºÃѽ  ¹þ¹þ
<1> var p={}; Ò²¾ÍÊÇ˵£¬³õʼ»¯Ò»¸ö¶ÔÏóp¡£
<2> p.__proto__=Person.prototype;
<3> Person.call(p);Ò²¾ÍÊÇ˵¹¹Ôìp£¬Ò²¿ÉÒÔ³ÆÖ®Îª³õʼ»¯p¡£
±ðÈ˸øµÄÒ»¸önewµÄ¹ý³Ì
/*
new²Ù×÷Ô­Àí£¨spiderMonkeyÒýÇæÏ£©
*/
var a = function(sA,sH){
var x = "x";
this.a = sA;
this.h = sH;
this.say = function(){alert(this.a+','+x)}
}
a.prototype.hi = function(){alert(this.h)}
var createInstance = function(source){
var p = {}
var args = Array.prototype.slice.call(arguments,1);
source.apply(p,args);
p.__proto__ = source.prototype;
return p;
}
var A = createInstance(a,"A","hi A");
A.say();
A.hi();
ÈçÒ»¸öÀà ,new Ö®ºóµÄ¶ÔÏóÈçÏÂ
function test(){
this.name="taozi";
}
test.prototype={
sex : "nan"
}
var ss = new test();
/*
ss¾ÍÏ൱ÓÚ
{
name : "nan",
__proto__ : {sex : "nan"}
}
*/
//¿ÉÒÔ²âÊÔÒ»ÏÂ
alert('-----------ÎÒÊÇ»ªÀöµÄ·Ö¸îÏß');
alert(ss.__proto__ === test.prototype); //¼ÇµÃÔÚfirefoxϲâÊÔ ieÏÂÎÞ·¨·ÃÎʵ½__proto__ ¿ÉÒÔ¿´µ½µ¯³öÀ´µÄÊÇtrue
 __proto__Õâ¸öÒ²µÃ½éÉÜÒ»ÏÂ,ËüÊǸöºÃ¶«Î÷.....
ÿ¸ö¶ÔÏóÔÚ³õʼ»¯µÄʱºò¶¼»áÓÐÕâôһ¸öÊôÐÔ;
Èç: (ÇëÔÚfirefoxϲâÊÔ)
var test ={};
alert(test.__proto__);  //¿ÉÒÔ¿´µ«µ¯³öµÄÊÇobj
µ±ÓÐÒ»¸ö¶ÔÏó ¼ÙÈçÊÇtest ;²éÕÒËûµÄaÊô


Ïà¹ØÎĵµ£º

JavaScriptµ÷ÓÃdataTable²¢»ñÈ¡ÆäÖµ(ASP.Net,VS2005)

JavaScriptµ÷ÓÃdataTable²¢»ñÈ¡ÆäÖµ(ASP.Net,VS2005)
     ±¾¹¦ÄÜÖ÷ÒªÓõ½http://www.cnblogs.com/Hdsome/archive/2008/06/26/1230177.htmlÕâ¸öÐֵܵĴúÂ룬ÎÒÖ÷ÒªÊÇ×öÕûÀíºÍÀ©Õ¹¡£
     Ê×ÏÈÔÚhttp://www.codeplex.com/AjaxPro/Release/ProjectReleases.aspx?ReleaseId=713ÍøÖ ......

JavaScriptµÄwindow¶ÔÏóµÄopen·½·¨

JavaScriptµÄwindow¶ÔÏóµÄopen·½·¨µÄÓï·¨¸ñʽÈçÏ£º
window.open("Ò³ÃæµÄURL","´°¿ÚÃû³Æ","´°¿Ú²ÎÊý");
Ò³ÃæµÄURL£ºÒ³ÃæµÄURL¿ÉÒÔÊÇÏà¶Ô·¾¶£¬Ò²¿ÉÒÔÊǾø¶Ô·¾¶¡£
´°¿ÚÃû³Æ£ºµ¯³ö´°¿ÚµÄÃû³Æ¿ÉÒÔ×ÔÐж¨Ò壬ËüµÄÒâÒåÔÚÓÚ£¬µ±ÄãË¢ÐÂԭʼµÄÕâҳȫ´°¿ÚµÄʱºò£¬µ¯³ö´°¿Ú¾Í»áË¢ÐÂÒ»´Î£»¶øÈç¹û°ÑÃû³ÆÊ¡ÂÔ£¬¸ÄΪ""£¬ÄÇôµ±Ë¢ÐÂÕâ ......

JavaScriptµ÷ÓÃWebService

// <!CDATA[
//define
var xmlhttp;
var value=new Array();
var variable=new Array();
//Show Response MSG.
function handleStateChange()
{
var h=document.getElementById("Label1");
if(xmlhttp.readyState==4)
{
if(xmlhttp.status==200)
{
alert(xmlhttp. ......

javascriptµ¥ÒýºÅºÍË«ÒýºÅÇø±ð

javascriptµ¥ÒýºÅºÍË«ÒýºÅÇø±ð2009-08-27 10:13ÔÚÒ»¸öÍøÒ³Öеİ´Å¥£¬Ð´onclickʼþµÄ´¦Àí´úÂ룬²»Ð¡ÐÄд³ÉÈçÏ£º

IEÌáʾ³ö´íºó£¬ÔÙÂþ²»¾­ÐĵظÄΪ£º

½á¹û»¹Êdzö´í¡£
Õâʱ£¬ÎÒ¾ÍÏ벻ͨÁË£¬ËäÈ»ÎÒÖªµÀ×îÖ±½ÓµÄ½â¾ö·½·¨ÊÇд³ÉÕâÑù£º

µ«ÎªÊ²Ã´javascriptÖеÄתÒå×Ö·û\ûÓÐЧ¹ûÁËÄØ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ