JS操作クッキー

<script>
 
// cookies     ：   
function SetCookie(name,value)//    ，   cookie   ，    
{
    var Days = 30; //  cookie      30  
    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)// cookies          
{
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
     if(arr != null) return unescape(arr[2]); return null;
 
}
function delCookie(name)//  cookie
{
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval=getCookie(name);
    if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();
}
 
 
 
SetCookie ("xiaoqi", "3")
alert(getCookie('xiaoqi'));
</script>