使用js获取cookie或许你会，但是要获取指定cookie，你会吗？下面有个不错的示例，大家可以参考下

 代码如下: var cookieName = "cookie名字";  var cookieValue = null;//返回cookie的value值  if (document.cookie && document.cookie != '') {  var cookies = document.cookie.split(';');//将获得的所有cookie切割成数组  for (var i = 0; i < cookies.length; i++) {  var cookie = cookies[i];//得到某下标的cookies数组  if (cookie.substring(0, cookieName.length + 2).trim() == cookieName.trim() + "=") {//如果存在该cookie的话就将cookie的值拿出来  cookieValue = cookie.substring(cookieName.length + 2, cookie.length);  break  }  }  }  if (cookieValue != "" && cookieValue != null) {//如果存在指定的cookie值  alert(cookieValue);  } else {<span style="font-family: Arial, Helvetica, sans-serif;">//如果cookie的值是空</span>  alert("not cookie!!!");  }   代码如下: //去除空格  String.prototype.trim = function () {  return this.replace(new RegExp("(^[s]*)|([s]*$)", "g"), "");  }