JavaScript與Cookie(一) :Cookie的讀取和寫入

來源:互聯網
上載者:User

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:

<script language="JavaScript" type="text/javascript">    /*     * 設定Cookie的通用函數,其中name是必須的參數。其它為可選,故用條件陳述式判斷。     * 在設定Cookie時若不設定到期時間則該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>

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