Question

我想要做的是弹出窗口在用户访问该页面时只显示一次但它每次刷新页面时都向我显示，我也需要它不警报我需要弹出窗口

请告知

//Alert message once script- By JavaScript Kit
//Credit notice must stay intact for use
//Visit http://javascriptkit.com for this script

//specify message to alert
var alertmessage="Welcome to JavaScript Kit! \n http://javascriptkit.com"

///No editing required beyond here/////

//Alert only once per browser session (0=no, 1=yes)
var once_per_session=1


function get_cookie(Name) {
  var search = Name + "="
  var returnvalue = "";
  if (document.cookie.length > 0) {
    offset = document.cookie.indexOf(search)
    if (offset != -1) { // if cookie exists
      offset += search.length
      // set index of beginning of value
      end = document.cookie.indexOf(";", offset);
      // set index of end of cookie value
      if (end == -1)
         end = document.cookie.length;
      returnvalue=unescape(document.cookie.substring(offset, end))
      }
   }
  return returnvalue;
}

function alertornot(){
if (get_cookie('alerted')==''){
loadalert()
document.cookie="alerted=yes"
}
}

function loadalert(){
alert(alertmessage)
}

if (once_per_session==0)
loadalert()
else
alertornot()

</script>

Answer 1

你如何运行你的代码？如果您从本地计算机将其作为浏览器中的文件运行，例如

file://localhost/../../../file.html

您无法从javascript保存Cookie。

您需要在网络服务器上运行代码，并使用http。

访问代码

http://localhost/../../../file.html

w3schools有一些非常好的例子： http://www.w3schools.com/js/js_cookies.asp

e.g

function setCookie(cname,cvalue,exdays) {
 var d = new Date();
 d.setTime(d.getTime()+(exdays*24*60*60*1000));
 var expires = "expires="+d.toGMTString();
 document.cookie = cname + "=" + cvalue + "; " + expires;
}

Javascript显示弹出消息一次，但每次页面加载时显示

1 个答案: