Cookie的增删改

function setCookie(name,value){var Days = 300;var exp = new Date();exp.setTime(exp.getTime() + Days

function setCookie(name,value){var Days = 300;var exp  = new Date();exp.setTime(exp.getTime() + Days*24*60*60*100);document.cookie = name + "="+  (value) + ";expires=" + exp.toGMTString();}function getCookie(name){var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));if(arr != null) return (arr[2]); return null;}function delCookie(name){var exp = new Date();exp.setTime(exp.getTime() - 1);var cval=getCookie(name); if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();}