如何在div中显示文本框

Question

这是我的index.php 页面。表格也在我的弹出框中以获取描述。

<form action="" method="post" onsubmit="store(this); return false">
<p>
    <input type="button" name="prev" onclick="goto(this.form, -1)" value="Previous" />
    <input type="button" name="next" onclick="goto(this.form, +1)" value="Next" />
</p>

<div>
    <noscript>Please enable JavaScript to see this form correctly</noscript>
</div>

<p>
    <input type="submit" name="submit" value="Store in database" />
</p>

这是我的 Javascript 文件 upload.js。

用户选择的文件在那里。-->

var files=new Array(); 函数插入（文件列表） { 文件[files.length]=文件列表；

            var filenames=(files.valueOf());

var max = files.length; 无功电流 = 0; 函数 goto(form, pos) {

current += pos;
form.prev.disabled = current <= 0;
form.next.disabled = current >= max - 1;
var fields = form.getElementsByTagName('fieldset');
for (var i = 0; i < fields.length; i++) fields[i].style.display = 'none';

fields[current].style.display = 'block';
form['name' + current].focus();
}

函数存储（表单） {

var input = form.getElementsByTagName('input');
var data = ''; 
for (var i = 0; i < input.length; i++) {
    if (input[i].getAttribute('type') == 'text')
        data += '&' + input[i].getAttribute('name') + '=' + input[i].value;
}
data = encodeURI('n=' + max + data);
var xhr = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP');
xhr.open('POST', 'datainsert.php', true);
xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
xhr.setRequestHeader('Content-length', data.length);
xhr.setRequestHeader('Connection', 'close');
xhr.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
        if (this.responseText != '')
             alert(this.responseText); 
     else {

            form.submit.value = 'Saved!';
            setTimeout(function() { form.submit.value = 'Save to database' }, 500);
        }

    }
}
xhr.send(data);

}






window.onload = function() 
{
    var form = document.forms[0];
    var container = form.getElementsByTagName('div')[0];
    container.innerHTML = '';
    for (var i = 0; i < max; i++)
        container.innerHTML += '<fieldset style="width: 250px; height: 80px;"><legend>Files of ' +(i + 1) + ' / ' + max + '</legend><input type="text" name="name' + i + '" /><br /><br /><input type="text" name="topic' + i + '" /></fieldset>';
    goto(form, 0);

}

<div>…</div> 没有显示文本框。为什么？

Answer 1

我的直觉告诉我，您错误地传递了 max，所以它要么是未定义的，要么是 0，因此永远不会运行循环，或者您的选择器错误 - 将 ID 添加到您的元素并这样做：

<form id="myForm" action="" method="post" onsubmit="store(this); return false">
<p>
    <input type="button" name="prev" onclick="goto(this.form, -1)" value="Previous" />
    <input type="button" name="next" onclick="goto(this.form, +1)" value="Next" />
</p>

<div id="container">
    <noscript>Please enable JavaScript to see this form correctly</noscript>
</div>

<p>
    <input type="submit" name="submit" value="Store in database" />
</p>

window.onload = function() 
{
    var form = document.getElementById('myForm');
    var container = document.getElementById('container');
    container.innerHTML = '';
    var html = '';
    for (var i = 0; i < max; i++)
    {
        var ofValue = (i + 1) + ' / ' + max;
        html += '<fieldset style="width: 250px; height: 80px;">';
        html += '<legend>Files of ' + ofValue + '</legend>';
        html += '<input type="text" name="name' + i + '" /><br /><br />';
        html += '<input type="text" name="topic' + i + '" /></fieldset>';
    }
    container.innerHTML = html;

    goto(form, 0); //I am assuming this is a valid, defined method
                   //because it is also called from onclicks of Next/Prev buttons
}

Answer 2

把id="div1"放在你的div标签里， 这将作为整个页面中 JavaScript 的标识符

<div id="dvi1">
    <noscript>Please enable JavaScript to see this form correctly</noscript>
</div>

Answer 3

<form action="" method="post" onsubmit="store(this); return false">
    <p>
        <input type="button" name="prev" onclick="goto(this.form, -1)" value="Previous" />
        <input type="button" name="next" onclick="goto(this.form, +1)" value="Next" />
    </p>

    <div  id="div1">
        <noscript>Please enable JavaScript to see this form correctly</noscript>
    </div>


    <p>
        <input type="submit" name="submit" value="Store in database" />
    </p>
</form>



window.onload = function() 
{

    var container = documentgetElementByid("div1");
    container.innerHTML = '';
    for (var i = 0; i < max; i++)
        container.innerHTML += '<fieldset style="width: 250px; height: 80px;"><legend>Files of ' +(i + 1) + ' / ' + max + '</legend><input type="text" name="name' + i + '" /><br /><br /><input type="text" name="topic' + i + '" /></fieldset>';
    goto(form, 0);

}