cookie值的设置，获取及删除

function setCookie( key, val, expire){
    var dateTime = new Date();
    dateTime.setTime( dateTime.getTime() + (expire)*24*3600*1000);
    document.cookie = key + "="+ val + "; expires=" + dateTime.toGMTString();
}
function delCookie(key){
    setCookie(key, "", -1 );
}
function getCookie( name ){
    var cookies = document.cookie;
    var cookieArr = cookies.split("; ");
    for( var i = 0; i < cookieArr.length; i++ ){
        var cookie = cookieArr[i].split("=");
        if( cookie[0] == name ){
            return cookie[1];
        }
    }
}
function set(){
    setCookie("aaa","landen",10);
}
function del(){
    delCookie("aaa");
}
function get(){
   alert(getCookie( "aaa"))
}
</script>
<body>
</body>