复制代码 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>//如果cookie的值是空</span>

alert("not cookie!!!");

}

复制代码 代码如下:

//去除空格

String.prototype.trim = function () {

return this.replace(new RegExp("(^[s]*)|([s]*$)", "g"), "");

}