//写cookiessetCookie = function(name, value, time) {  var strsec = getsec(time);  var exp = new Date();  exp.setTime(exp.getTime() + strsec * 1);  document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();}//cookie操作辅助函数getsec = function(str) {  var str1 = str.substring(1, str.length) * 1;  var str2 = str.substring(0, 1);  if (str2 == "s") {    return str1 * 1000;  } else if (str2 == "h") {    return str1 * 60 * 60 * 1000;  } else if (str2 == "d") {    return str1 * 24 * 60 * 60 * 1000;  }}//读取cookiesgetCookie = function(name) {  var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");  if (arr = document.cookie.match(reg)) return (arr[2]);  else return null;}//删除cookiesdelCookie = function(name) {  var exp = new Date();  exp.setTime(exp.getTime() - 1);  var cval = getCookie(name);  if (cval != null) document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();}

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