js cookie常用操作

/**
 * [setCookie 设置cookie]
 * @param {[type]} name  cookie名称
 * @param {[type]} value cookie值
 * @param {[type]} time  时间（例如20s或1h）
 */
function setCookie(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();
}
/**
 * [getsec 获取毫秒数]
 * @param  {[type]} str [description]
 * @return {[type]}     [description]
 */
function getsec(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;
  }
}
/**
 * [getCookie 读取cookies ]
 * @param  {[type]} name [description]
 * @return {[type]}      [description]
 */
function getCookie(name) {
  var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");

  if (arr = document.cookie.match(reg))

    return unescape(arr[2]);
  else
    return null;
}
/**
 * [delCookie 删除cookies ]
 * @param  {[type]} name [description]
 * @return {[type]}      [description]
 */
function delCookie(name) {
  var exp = new Date();
  exp.setTime(exp.getTime() - 60 * 60 * 1000);
  var cval = getCookie(name);
  if (cval != null)
    document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString() + ";path=/";
}