本文实例讲述了JS实现清除指定cookies的方法，非常实用。分享给大家供大家参考。

具体实现代码如下：

function GetCookieValue(name) {    var cookieValue = null;    if (document.cookie && document.cookie != '') {   var cookies = document.cookie.split(';');   for (var i = 0; i < cookies.length; i++) {     var cookie = jQuery.trim(cookies[i]);     //PYYH=USERNAME=steven&PASSWORD=111111&UserID=1&UserType=1     if (cookie.substring(0, name.length + 1) == (name + '=')) {   cookieValue = decodeURIComponent(cookie.substring(name.length + 1));   //USERNAME=steven&PASSWORD=111111&UserID=1&UserType=1   break;     }   }    }    return cookieValue;  }  function DelCookie(name) {    var exp = new Date();    exp.setTime(exp.getTime() + (-1 * 24 * 60 * 60 * 1000));    var cval = GetCookieValue(name);    document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();  }     function exit() {    DelCookie("PYYH");    window.location.replace("http://localhost:7877/index.aspx");  }