当用户点击显示链接时，显示密码，再次点击时

问题描述

我试图让这个简单的脚本工作.基本上，当用户单击 Show 链接时，它会在密码文本框中显示密码，并在再次单击时将其隐藏.我一直在寻找解决方案，但找不到任何我需要的东西.代码如下:

I am trying to get this simple script to work. Basically, when a user clicks on the Show link, it will display the password in the password text box and hide it when it is clicked again. I have searched for solutions but couldn't find anything for what I need. Here is the code:

    function toggle_password(target){
    var tag = getElementById(target);
    var tag2 = getElementById("showhide");
    if (tag2.innerHTML == 'Show'){
        tag.setAttribute('type', 'text');   
        tag2.innerHTML = 'Hide';
    }
    else{
        tag.setAttribute('type', 'password');   
        tag2.innerHTML = 'Show';
    }

    }

HTML

<label for="pwd0">Password:</label>
<input type="password" value="####" name="password" id="pwd0" />
<a href="#" onclick="toggle_password('pwd0');" id="showhide">Show</a>

当我点击链接时，什么也没有发生.我也没有使用 if 语句对此进行了测试，但仍然什么也没做.

When I click the link, nothing happens. I have tested this without using the if statement too and still did nothing.

推荐答案

你没有在 getElementById

function toggle_password(target){
    var d = document;
    var tag = d.getElementById(target);
    var tag2 = d.getElementById("showhide");

    if (tag2.innerHTML == 'Show'){
        tag.setAttribute('type', 'text');   
        tag2.innerHTML = 'Hide';

    } else {
        tag.setAttribute('type', 'password');   
        tag2.innerHTML = 'Show';
    }
}

您的 id 名称是非法的且难以使用:pwd'.$x.' 您不能使用其中一些字符.

your id names are illegal and difficult to work with: pwd'.$x.' you can't have some of those chars.

HTML 4.01 规范规定 ID 标记必须以字母 ([A-Za-z]) 开头，后面可以跟任意数量的字母、数字 ([0-9])、连字符 (-)、下划线(_)、冒号 (:) 和句点 (.).

The HTML 4.01 spec states that ID tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens (-), underscores (_), colons (:), and periods (.).

此外，此方法不适用于所有浏览器，在 IE <9 例如，您只能在元素附加到文档之前更改 .type

also, this method will not work in all browsers, in IE < 9 for instance you can only change .type before the element is attached to the document

尝试交换它们:

function swapInput(tag, type) {
  var el = document.createElement('input');
  el.id = tag.id;
  el.type = type;
  el.name = tag.name;
  el.value = tag.value; 
  tag.parentNode.insertBefore(el, tag);
  tag.parentNode.removeChild(tag);
}

function toggle_password(target){
    var d = document;
    var tag = d.getElementById(target);
    var tag2 = d.getElementById("showhide");

    if (tag2.innerHTML == 'Show'){

        swapInput(tag, 'text');
        tag2.innerHTML = 'Hide';

    } else {
        swapInput(tag, 'password');   
        tag2.innerHTML = 'Show';
    }
}

希望这有助于 -ck

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