javascript操作cookie

function setcookie(name,value) //兩個參數，一個是cookie的名字，一個是值
{

    var days = 30; //此 cookie 將被保存30天

    var exp  = new date();    //new date("december 31, 9998");

    exp.settime(exp.gettime() + days*24*60*60*1000);

    document.cookie = name + "="+ escape (value) + ";expires=" + exp.togmtstring();

}

function getcookie(name) //取cookies函數       

{

    var arr = document.cookie.match(new regexp("(^| )"+name+"=([^;]*)(;|$)"));

     if(arr != null) return unescape(arr[2]); return null;

}

function delcookie(name)//刪除cookie

{

    var exp = new date();

    exp.settime(exp.gettime() - 1);

    var cval=getcookie(name);

    if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.togmtstring();

}



//示例

setcookie ("xiaoqi", "3")

alert(getcookie('xiaoqi'));