$(document).ready(function() {
// #login-box password field
$('#password').attr('type', 'text');
$('#password').val('Password');
});
这是为了将password类型的#password输入字段(id="password")更改为普通的文本字段，然后填充文本"password"。
但这并不奏效。为什么?
表格如下:
<form enctype="application/x-www-form-urlencoded" method="post" action="/auth/sign-in">
<ol>
<li>
<div class="element">
<input type="text" name="username" id="username" value="Prihlasovacie meno" class="input-text" />
</div>
</li>
<li>
<div class="element">
<input type="password" name="password" id="password" value="" class="input-text" />
</div>
</li>
<li class="button">
<div class="button">
<input type="submit" name="sign_in" id="sign_in" value="Prihlásiť" class="input-submit" />
</div>
</li>
</ol>
</form>
更容易……不需要创建所有动态元素。只需创建两个单独的字段，其中一个为“真实”密码字段(type="password")，另一个为“假”密码字段(type="text")，将假字段中的文本设置为浅灰色，并将初始值设置为“password”。然后用jQuery添加几行Javascript代码，如下所示:
<script type="text/javascript">
function pwdFocus() {
$('#fakepassword').hide();
$('#password').show();
$('#password').focus();
}
function pwdBlur() {
if ($('#password').attr('value') == '') {
$('#password').hide();
$('#fakepassword').show();
}
}
</script>
<input style="color: #ccc" type="text" name="fakepassword" id="fakepassword" value="Password" onfocus="pwdFocus()" />
<input style="display: none" type="password" name="password" id="password" value="" onblur="pwdBlur()" />
因此，当用户输入“假”密码字段时，它将被隐藏，真实字段将被显示，焦点将移动到真实字段。他们将永远无法在假字段中输入文本。
当用户离开真实的密码字段时，脚本将查看它是否为空，如果为空，将隐藏真实的字段并显示假的字段。
注意不要在两个输入元素之间留下空格，因为IE会将一个元素置于另一个元素之后(呈现空格)，并且当用户进入/退出字段时，字段会出现移动。
Here is a method which uses an image next to the password field to toggle between seeing the password (text input) and not seeing it (password input). I use an "open eye" and "closed eye" image, but you can use whatever suits you. The way it works is having two inputs/images and upon clicking the image, the value is copied from the visible input to the hidden one, and then their visibility is swapped. Unlike many of the other answers which use hardcoded names, this one is general enough to use it multiple times on a page. It also degrades gracefully if JavaScript is unavailable.
这是其中两个在一页上的样子。在这个例子中，密码a是通过点击它的眼睛来显示的。
$(document).ready(function() {
$('img.eye').show();
$('span.pnt').on('click', 'img', function() {
var self = $(this);
var myinp = self.prev();
var myspan = self.parent();
var mypnt = myspan.parent();
var otspan = mypnt.children().not(myspan);
var otinp = otspan.children().first();
otinp.val(myinp.val());
myspan.hide();
otspan.show();
});
});
img.eye {
vertical-align: middle;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<form>
<b>Password-A:</b>
<span class="pnt">
<span>
<input type="password" name="passa">
<img src="eye-open.png" class="eye" alt="O" style="display:none">
</span>
<span style="display:none">
<input type="text">
<img src="eye-closed.png" class="eye" alt="*">
</span>
</span>
</form>
<form>
<b>Password-B:</b>
<span class="pnt">
<span>
<input type="password" name="passb">
<img src="eye-open.png" class="eye" alt="O" style="display:none">
</span>
<span style="display:none">
<input type="text">
<img src="eye-closed.png" class="eye" alt="*">
</span>
</span>
</form>
下面是允许您更改文档中元素类型的一小段代码。
jquery.type.js (GitHub Gist)
var rtype = /^(?:button|input)$/i;
jQuery.attrHooks.type.set = function(elem, value) {
// We can't allow the type property to be changed (since it causes problems in IE)
if (rtype.test(elem.nodeName) && elem.parentNode) {
// jQuery.error( "type property can't be changed" );
// JB: Or ... can it!?
var $el = $(elem);
var insertionFn = 'after';
var $insertionPoint = $el.prev();
if (!$insertionPoint.length) {
insertionFn = 'prepend';
$insertionPoint = $el.parent();
}
$el.detach().attr('type', value);
$insertionPoint[insertionFn]($el);
return value;
} else if (!jQuery.support.radioValue && value === "radio" && jQuery.nodeName(elem, "input")) {
// Setting the type on a radio button after the value resets the value in IE6-9
// Reset value to it's default in case type is set after value
// This is for element creation
var val = elem.value;
elem.setAttribute("type", value);
if (val) {
elem.value = val;
}
return value;
}
}
它通过从文档中删除输入、更改类型然后将其放回原来的位置来解决这个问题。
请注意，这段代码只针对WebKit浏览器进行了测试——对其他任何浏览器都不能保证!
