javascript如何删除Cookie(2)-木庄网络博客

使用JavaScript清理Cookie首先要找到该Cookie对应的Name对应的值，然后设置其为过期：
找到Cookie有下面方法：

function getCookie2(name){
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));  
    if(arr != null) 
        return unescape(arr[2]); 
        return null;
}

找到后设置为过期，切记设置domain和path，只有这两个参数跟你要删除的参数完全一样才能把它删除掉。

function resetNfluent(){
        alert("before=>"+document.cookie);
        var exp  = new Date();
        exp.setTime(exp.getTime() - 1);
        var cval=getCookie2('name');
        var lanObj=document.getElementById('lanOption');
        var lanSel=lanObj.value;
        alert(lanSel);
        if(lanSel=='en'){
            alert('let\'s reset nFluent');
            alert('cval=>'+cval);
            if(cval!=null){
                document.cookie="name="+cval+";
                domain=.example.com;
                expires="+exp.toGMTString()+";
                path=/";
            }else{
                document.cookie="name=;
                domain=.example.com;
                expires="+exp.toGMTString()+";
                path=/";
                }
        }else{
            alert('Don\'t need reset nFluent');
            }
        alert("after=>"+document.cookie);
    }