存儲和獲取cookie

function getCookie(name){  var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");  if(arr=document.cookie.match(reg))    return unescape(arr[2]);  else    return null;}function setCookie(name,value){  var Days = 1;  var exp = new Date();  exp.setTime(exp.getTime() + Days*24*60*60*1000);  document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();}