使用javascript创建和提交表单

问题描述：

我正在尝试创建一个表单并立即使用javascript提交它，我无法弄清楚我做错了什么。这是我的代码：

I'm trying to create a form and submit it immediately with javascript and I cannot figure out what I'm doing wrong. here is my code:

function autoLogIn(un, pw) {
var form = document.createElement("form");
document.body.appendChild(form);
form.method = "POST";
form.action = "login.php";
var element1 = document.createElement("<INPUT NAME='un' TYPE='hidden' VALUE='"+un+"'>");  
 form.appendChild(element1);
var element2 = document.createElement("<INPUT NAME='pw' TYPE='hidden' VALUE='"+pw+"'>"); 
form.appendChild(element2);
form.submit();
}

答

问题是createElement会不接受HTML。它接受标记名并返回DOM元素。然后，您可以将此元素的value属性设置为您需要的值。

The problem is that createElement does not accept HTML. It accepts a tagname and returns a DOM element. You can then set the value attribute on this element to what you require.

function autoLogIn(un, pw) {
    var form = document.createElement("form");
    var element1 = document.createElement("input"); 
    var element2 = document.createElement("input");  

    form.method = "POST";
    form.action = "login.php";   

    element1.value=un;
    element1.name="un";
    form.appendChild(element1);  

    element2.value=pw;
    element2.name="pw";
    form.appendChild(element2);

    document.body.appendChild(form);

    form.submit();
}

使用javascript创建和提交表单

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