Question

我有这个JS脚本设置cookie并显示/隐藏div

<html>
<head>
<script type="text/javascript">
function setCookie (name, value, expires, path, domain, secure) {
    document.cookie = name + "=" + escape(value) +
    ((expires) ? "; expires=" + expires : "") +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    ((secure) ? "; secure" : "");
}
function getCookie (name) {
    var cookie = " " + document.cookie;
    var search = " " + name + "=";
    var setStr = null;
    var offset = 0;
    var end = 0;
    if (cookie.length > 0) {
        offset = cookie.indexOf(search);
        if (offset != -1) {
            offset += search.length;
            end = cookie.indexOf(";", offset);
            if (end == -1) {
                end = cookie.length;
            }
            setStr = unescape(cookie.substring(offset, end));
        }
    }
    if (setStr == 'false') {
        setStr = false;
    } 
    if (setStr == 'true') {
        setStr = true;
    }
    if (setStr == 'null') {
        setStr = null;
    }
    return(setStr);
}
function hidePopup() {
    setCookie('popup_state', false); 
    document.getElementById('popup').style.display = 'none';
}
function showPopup() {
    setCookie('popup_state', null);
    document.getElementById('popup').style.display = 'block';
}
function checkPopup() {
    if (getCookie('popup_state') == null) { // if popup was not closed
        document.getElementById('popup').style.display = 'block';
    }   
}

</script>
</head>
<body onLoad="checkPopup();">
<a href="#" onClick="hidePopup(); return false;">Turn Off</a></br></br>
<a href="#" onClick="showPopup(); return false;">Turn On</a>
     <div id="popup" style="display:none">Hello! Welcome to my site. If you want to hide this message then click</div>
</body>
</html>

我需要有人，如果有人能够向我解释，我该如何更改cookie值？（名称，过期等）以及如何将开/关按钮合并为1个按钮，以完成切换显示/隐藏和相应编辑cookie的工作。

Answer 1

要更改cookie的当前值，您可以使用与cookie的当前值重叠的相同名称再次设置cookie

到第二个问题，您可以使用复选框打开/关闭

    function shoWhidePopup(el){
    if(el.checked==true){
        showPopup();
    }else if(el.checked==false){
        hidePopup();
    }
}

并在html中

<label>
    <input type="checkbox" onclick="shoWhidePopup(this);" hidden>
    <span style="appearance:button; -moz-appearance:button; -webkit-appearance:button;">show/hide</span>
</label>

JS cookie div可见性

1 个答案: