改变<输入>使用 JavaScript 在 IE 中输入 [英] Changing the <input> type in IE with JavaScript

问题描述

以下代码适用于除 IE 之外的所有网络浏览器:

This code below works in all web browsers except IE:

<input type="text" name="passwordLogin" value="Password" onfocus="if(this.value=='Password'){this.value=''; this.type='password'};" onblur="if(this.value==''){this.value='Password'; this.type='text'};" size="25" />

如何为 IE 修复它?

How can I fix it for IE?

我做了一些更改，但仍然有错误.

I did some changes, but it still has an error.

我希望它像这里一样工作:

I want it to work like this like here:

<input type="text" name="usernameLogin" value="Email" onfocus="if(this.value=='Email'){this.value=''};" onblur="if(this.value==''){this.value='Email'};" size="25" />

如果我不输入任何内容，它会将值放回.

if I don't enter anything it will put the value back.

所以我尝试了这个:

<td colspan="2" id="passwordLoginTd">
     <input id="passwordLoginInput1" type="text" name="passwordLogin" value="Password" onfocus="passwordFocus()" size="25" />
     <input id="passwordLoginInput2" style="display: none;" type="password" name="passwordLogin" value="" onblur="passwordBlur()" size="25" />
    </td>
    <script type="text/javascript">
    //<![CDATA[

     passwordElement1 = document.getElementById('passwordLoginInput1');
     passwordElement2 = document.getElementById('passwordLoginInput2');

     function passwordFocus() {

      passwordElement1.style.display = "none";
      passwordElement2.style.display = "inline";
      passwordElement2.focus();

     }

     function passwordBlur() {

      if(passwordElement2.value=='') {

       passwordElement2.style.display = "none";
       passwordElement1.style.display = "inline";
       passwordElement1.focus();

      }

     }

    //]]>
    </script>

如您所见，模糊不起作用.

as you can see the blur does not work.

终于明白了，我需要删除:

Finally I got it, I needed to remove:

passwordElement1.focus();

推荐答案

您不能在 Internet Explorer 中动态更改输入元素的类型.

You cannot dynamically change a the type of an input element in Internet Explorer.

一种可能的解决方法是:

One possible workaround would be to:

• 动态创建一个新元素.
• 将旧元素的属性复制到新元素中.
• 将新元素的类型设置为新类型.
• 然后用新元素替换旧元素.

您可能需要查看以下文章以了解上述内容的 JavaScript 植入:

You may want to check the following article for a JavaScript implantation of the above:

• 使用 JavaScript 更改输入元素类型

另一种选择是静态创建两个元素，但一次只有一个可见.可见性和焦点将取决于元素的价值.在这种情况下，您可能需要使用以下内容:

Another option would be to statically create the two elements, but having only one visible at a time. The visibility and the focus would depend on the value of the elements. In this case, you may want to use something like this:

<script type="text/javascript">   
  function checkType() {
     var thisElement = document.getElementById('field_text');
     var otherElement = document.getElementById('field_password');

     if (thisElement.value === 'Password') {            
        otherElement.style.display = 'inline';
        thisElement.style.display = 'none';
        otherElement.focus();
     }
  }
</script>

<input type="text" value="Password" id="field_text" onfocus="checkType();" />
<input type="password" value="" style="display: none;" id="field_password" />

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