JS中的cookie

<script>//设置cookiefunction setCookie(cname, cvalue, exdays) {//输入要设置的属性名、对应的值、过期时间    var d = new Date();    d.setTime(d.getTime() + (exdays*24*60*60*1000));    var expires = "expires="+d.toUTCString();    document.cookie = cname + "=" + cvalue + "; " + expires;}//获取cookiefunction getCookie(cname) {    var name = cname + "=";    var ca = document.cookie.split(';');    for(var i=0; i<ca.length; i++) {        var c = ca[i];        while (c.charAt(0)==' ') c = c.substring(1);        if (c.indexOf(name) != -1) return c.substring(name.length, c.length);    }    return "";}//清除cookie  function clearCookie(name) {      setCookie(name, "", -1);  }  function checkCookie() {    var user = getCookie("username");    if (user != "") {        alert("Welcome again " + user);    } else {        user = prompt("Please enter your name:", "");        if (user != "" && user != null) {            setCookie("username", user, 365);        }    }}checkCookie(); </script>

cookie.js

function createCookie(name,value,days,path,domain,secure){//创建Cookieif(dyas){var myday = new Date();myday.setTime(myday.getTime() + (myday*60*60*24*1000));var expires = myday.toGMTString();}else var expires = "";cookieString = name + "=" + escape(value);if(expires) cookieString += " ;expires =" +expires;if(path) cookieString += ";path = " +escape(path);if(domain) cookieString += ";domain = " +escape(domain);if(secure) cookieString += ";secure =" +escape(secure);document.cookie = cookieString;}function getCookie(name){var nameEquals = name + "=";var crus = document.cookie.split(";");for(var i = 0;i<crus.length;i++){var cru = crus[i];if(cru.indexOf(nameEquals)==0){return unescape(cru.substring(nameEquals.length,cru.length));}}return null;}function delCookie(){createCookie(name,"",-1);}