cookie的使用

function setCookie(name,value,hours){  
    var d = new Date();
    d.setTime(d.getTime() + hours * 3600 * 1000);
    document.cookie = name + ‘=‘ + value + ‘; expires=‘ + d.toGMTString();
}

function getCookie(name){  
    var arr = document.cookie.split(‘; ‘);
    for(var i = 0; i < arr.length; i++){
        var temp = arr[i].split(‘=‘);
        if(temp[0] == name){
            return temp[1];
        }
    }
    return ‘‘;
}

function removeCookie(name){
    var d = new Date();
    d.setTime(d.getTime() - 10000);
    document.cookie = name + ‘=1; expires=‘ + d.toGMTString();
}