JavaScript Cookie的讀取和寫入函數

2019-11-21 00:55:42

字體：大中小

來源：轉載

供稿：網友

Html代碼：

 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 
<title>JavaScript與Cookie(一)</title> 
</head> 
<body> 
<form name="frm1" method="post" onsubmit="savecookie()"> 
<p>CookieMessage:<input type="text" name="cookieInfo" size="50"/></p> 
<p>Valid-time:<input type="text" name="time" size="10" value="30"/>Please input a integer.</p> 
<div style="border:1px solid #ccc;" id="divInfo"></div> 
<p><input type="submit" name="submit" value="Submit"> 
<input type="reset" name="reset" value="Reset"/></p> 
<p><input type="button" onclick="writeAllCookie()" value="writeAllCookie"/></p> 
<p><input type="text" name="txtGetSpc"/> <input type="button" value="GetSpecificCookie" onclick="getCk()" </p> 
</form> 
</body> 
</html> 

Js代碼：

復制代碼代碼如下:

 
<script language="JavaScript" type="text/javascript"> 
/* 
* 設置Cookie的通用函數，其中name是必須的參數。其它為可選，故用條件語句判斷。 
* 在設置Cookie時若不設置過期時間則該Cookie為臨時的，僅當此次會話可用 
*/ 
function setcookie(name, value, expires, path, domain, secure) { 
var curcookie = name + "=" + encodeURI(value) 
+((expires) ? ";expires=" + expires.toGMTString() : "") 
+((path) ? ";path=" + path : "") 
+((domain) ? ";domain=" + domain : "") 
+((secure) ? ";secure" : ""); 
document.cookie = curcookie; 
} 

//Cookie的寫入 
function savecookie() { 
var cookieInfo = document.frm1.cookieInfo.value; 
var time = document.frm1.time.value; 
var now = new Date(); 
now.setDate( now.getDate() + time); 
setcookie("myCookie",cookieInfo,now); 
document.write(decodeURI(document.cookie)); 
} 

//讀取所有Cooke 
function writeAllCookie() { 
document.cookie = "name1=" + encodeURI("名字1"); 
document.cookie = "name2=" + encodeURI("名字2"); 
document.cookie = "name3=" + encodeURI("名字3"); 
var strInfo; 
var cookie = document.cookie.split(";"); 
for(var i=0; i<cookie.length; i++) { 
var ck = cookie[i].split("="); 
var cName = ck[0]; 
var cValue = decodeURI(ck[1]); 
strInfo += cName + "=" + cValue +"<br>"; 
} 
document.getElementById("divInfo").innerHTML = strInfo; 
} 

/* 
* 讀取特定Cookie的通用函數 
*/ 
function getSpecificCookie(name) { 
if(document.cookie.length > 0) { 
start = document.cookie.indexOf(name + "="); 
if( start != -1) { 
start = start + name.length + 1; 
end = document.cookie.indexOf(";",start); 
if( end == -1) { 
end = document.cookie.length; 
} 
} 
return decodeURI(document.cookie.substring(start,end)); 
} 
return ""; 
} 

function getCk(){ 
name = document.frm1.txtGetSpc.value; 
alert( getSpecificCookie(name)); 
} 
</script> 