为什么 Internet Explorer 不允许更改输入类型？
我写了一个现代的登录表单，其中“用户名”写在一个字段中，但是是灰色的，当您单击它时，它消失并且文本也变成黑色，我还有一个“密码”，它以文本输入开头，但是当您单击它时，它应该更改为密码类型，但它仍然是文本。这个接缝似乎只出现在IE8上？为什么以及有解决方法吗？
onFocus='if (this.value == "Password"){ this.value = ""; this.type = "password";}'
I have written a modern login form where 'Username' is written in one field, but is grey, when you click it, it vanishes and also turns the text black, I also have a 'Password' on that starts as a text input, but when you click on it, it is supposed to change to a password type, but it remains text. This seams to only appear on IE8? why and is there a work around?
onFocus='if (this.value == "Password"){ this.value = ""; this.type = "password";}'
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Internet Explorer 的 DOM 实现并非旨在处理动态更改的 INPUT 类型。请参阅 http://msdn.microsoft.com/en-us/library/ms534700。 .aspx.
作为解决方法，您可以隐藏密码字段，然后在文本框和密码字段之间切换可见性。
Internet Explorer's DOM implementation wasn't designed to handle dynamically changing INPUT types. See http://msdn.microsoft.com/en-us/library/ms534700.aspx.
As a workaround, you can have a hidden password field and then switch visibility between the text box and the password field.