Javascript IFRAME和后退/前进按钮_Javascript_Internet Explorer_Iframe_Browser History_Hta

Javascript IFRAME和后退/前进按钮

javascript internet-explorer iframe

Javascript IFRAME和后退/前进按钮,javascript,internet-explorer,iframe,browser-history,hta,Javascript,Internet Explorer,Iframe,Browser History,Hta,我正在开发一个简单的.hta应用程序，它有一个控制面板和一个IFRAME 我添加了一个后退和前进按钮，但它们似乎不起作用。如果单击下面示例中的链接“a”和“b”，则后退和前进按钮不起任何作用如何做到这一点 test.hta =================================== <!DOCTYPE html> <html> <head> <title>Back / Forward Buttons</title>

我正在开发一个简单的.hta应用程序，它有一个控制面板和一个IFRAME

我添加了一个后退和前进按钮，但它们似乎不起作用。如果单击下面示例中的链接“a”和“b”，则后退和前进按钮不起任何作用

如何做到这一点

test.hta
===================================
<!DOCTYPE html>
<html>
<head>
    <title>Back / Forward Buttons</title>
    <hta:application id="test" applicationname="test" icon="res/icon.ico" showintaskbar="yes" singleinstance="yes">
</head>
<body>
    <div class="strip">
        <button onclick="output.history.back(); return false">Back</button>
        <button onclick="output.history.forward(); return false">Forward</button>
    </div>

    <div id="iframe-wrap" class="iframe-container">
        <iframe id="output" name="output" src="a.html" width="100%" border="0" frameborder="no" scrolling="yes"></iframe>
    </div>
</body>
</html>

a.html
===================================
<!DOCTYPE html>
<html>
    <head><title>A</title></head>
    <body>PAGE A - <a href="b.html">Go to B</a></body>
</html>

b.html
===================================
<!DOCTYPE html>
<html>
    <head><title>B</title></head>
    <body>PAGE B - <a href="a.html">Go to A</a></body>
</html>

test.hta
===================================
后退/前进按钮
返回
向前地
a、 html
===================================
A.
A页-
b、 html
===================================
B
B页-

试试：

或

可能更好的方法是使用getElementByID获取您试图在其上使用历史记录的元素

iFrame的历史记录中也存在一些已知的跨浏览器问题，但我记不清当时发生了什么，但谷歌应该能够为您解答这些问题。

我不得不使用以下方法手动跟踪iFrame中的页面更改：

    var iFrameHistory = {
        history : [],
        pos     : 0,
        ignore  : false,

        updateUI: function() {
            var el;

            // Enable / disable back button?
            el = document.getElementById('back');
            if (iFrameHistory.pos === 1)
                el.className = 'disabled';
            else
                el.className = '';

            // Enable / disable forward button?
            el = document.getElementById('forward');
            if (iFrameHistory.pos >= iFrameHistory.history.length)
                el.className = 'disabled';
            else
                el.className = '';
        },

        back: function() {
            var newPos = Math.max(1, this.pos - 1);
            if (newPos !== this.pos) {
                this.pos = newPos;
                this.ignore = true;
                document.getElementById('output').src = this.history[ this.pos - 1 ];

                this.updateUI();
            }
        },
        forward: function() {
            var newPos = Math.min(this.history.length, this.pos + 1);
            if (newPos !== this.pos) {
                this.pos = newPos;
                this.ignore = true;
                document.getElementById('output').src = this.history[ this.pos - 1 ];

                this.updateUI();
            }
        },
        reload: function() {
            document.getElementById('output').contentWindow.location.reload();
        },
        onload: function() {
            if (!this.ignore) {
                var href = document.getElementById('output').contentWindow.location.href;
                if (href !== this.history[ this.pos - 1 ]) {
                    this.history.splice(this.pos, this.history.length - this.pos);
                    this.history.push(href);
                    this.pos = this.history.length;

                    this.updateUI();
                }
            }
            else {
                this.ignore = false;
            }
        }
    };

window.frames.output.history.go(+1);

    var iFrameHistory = {
        history : [],
        pos     : 0,
        ignore  : false,

        updateUI: function() {
            var el;

            // Enable / disable back button?
            el = document.getElementById('back');
            if (iFrameHistory.pos === 1)
                el.className = 'disabled';
            else
                el.className = '';

            // Enable / disable forward button?
            el = document.getElementById('forward');
            if (iFrameHistory.pos >= iFrameHistory.history.length)
                el.className = 'disabled';
            else
                el.className = '';
        },

        back: function() {
            var newPos = Math.max(1, this.pos - 1);
            if (newPos !== this.pos) {
                this.pos = newPos;
                this.ignore = true;
                document.getElementById('output').src = this.history[ this.pos - 1 ];

                this.updateUI();
            }
        },
        forward: function() {
            var newPos = Math.min(this.history.length, this.pos + 1);
            if (newPos !== this.pos) {
                this.pos = newPos;
                this.ignore = true;
                document.getElementById('output').src = this.history[ this.pos - 1 ];

                this.updateUI();
            }
        },
        reload: function() {
            document.getElementById('output').contentWindow.location.reload();
        },
        onload: function() {
            if (!this.ignore) {
                var href = document.getElementById('output').contentWindow.location.href;
                if (href !== this.history[ this.pos - 1 ]) {
                    this.history.splice(this.pos, this.history.length - this.pos);
                    this.history.push(href);
                    this.pos = this.history.length;

                    this.updateUI();
                }
            }
            else {
                this.ignore = false;
            }
        }
    };