如何在JavaScript中取消设置Cookie值? [英] How to unset cookie value in javascript?

问题描述

此处 是我用来取消cookie的功能.

 <   a     href   ="     onclick   ="  >  <  输入   类型  ="    值  ="    样式  ="  / >  <  /a  >  

 功能 removeCookie(){//  var  str = 文档 .cookie;
     var 用户名= str.replace(/(?:(?:^ |.*; \ s *)用户名\ s * \ = \ s *([^; ] *).* $)| ^.* $/，" );
    如果(用户名){
        文档 .cookie = " ;
        警报(用户名);
        如果(用户名== '  NULL' ){
            窗口.位置 .href = '  login.html';
        }
    }
} 

 cookie 的值首次不是设置为" .第二次单击按钮时，其有效的 .请向我显示 如果 有任何错误.请帮助我.谢谢解决方案

)| ^.*

/，" )； 如果(用户名){ 文档 .cookie = " ; 警报(用户名); 如果(用户名== ' NULL' ){ 窗口.位置 .href = ' login.html'; } } }

 cookie 的值首次不是设置为" .第二次单击按钮时，其有效的 .请向我显示 如果 有任何错误.请帮助我.谢谢Here is my function to unset cookie.

<a href="#" onclick="removeCookie();"><input type="submit" value="Log Out" style="cursor:pointer;"/></a>

function removeCookie() {  //Logout

    var str = document.cookie;
    var username = str.replace(/(?:(?:^|.*;\s*)username\s*\=\s*([^;]*).*$)|^.*$/, "$1"); 
    if (username) {
        document.cookie = "username=NULL";        
        alert(username);        
        if (username == 'NULL') {            
            window.location.href = 'login.html';
        }
    }
}

For the first time the value of the cookie is not being set to "NULL". Its working for the second time button click. Please show me if there is any error.Please help me .Thank you in advance.

解决方案

)|^.*

/, "

1"); if (username) { document.cookie = "username=NULL"; alert(username); if (username == 'NULL') { window.location.href = 'login.html'; } } }

For the first time the value of the cookie is not being set to "NULL". Its working for the second time button click. Please show me if there is any error.Please help me .Thank you in advance.

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