js setCookie和getCookie

function setCookie(name,value){var Days = 30;var exp = new Date();exp.setTime(exp.getTime() + Days*24*60*60*30);document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();}function getCookie(name){var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");if(arr=document.cookie.match(reg))return unescape(arr[2]);elsereturn null;}