[英]how to change value of textfield of HTML using javascript
<head>
<script type="javascript">
function display()
{
document.getElementById("textField1").value = "abc";
}
</script>
</head>
<body>
<form id="form1" action="http://google.com">
<input id="textField1" type="text" value="0" align="right" size="13"/><br>
<input id="button1" type="button" value="1" onclick="display()">
</form>
</body>
but the value of textfield is not changing. 但是textfield的值并没有改变。
Any Ideas what am i doing wrong ?? 任何想法我做错了什么?
try 尝试
<script type="text/javascript">
instead of 代替
<script type="javascript">
. 。 I believe the latter is not a valid syntax. 我相信后者不是一个有效的语法。
Removing the type
attribute entirely works as well: 删除type
属性也完全有效:
<script>
Remove the type
from your script
tag. 从script
标记中删除type
。 It's incorrect and making the browser not treat the script
contents as JavaScript. 这是不正确的,并使浏览器不将script
内容视为JavaScript。 Here it is not working , and here it is working (with the type="javascript"
removed). 这里它不起作用 , 这里它正在工作 (删除了type="javascript"
)。
Your line 你的路线
document.getElementById("textField1").value = "abc";
is correct, try 是的,试试吧
<head>
<script>
function display() {
document.getElementById("textField1").value = "abc";
}
</script>
</head>
<body>
<form id="form1" action="http://google.com">
<input id="textField1" type="text" size="13" value="clear" /><br>
<input type="button" onclick="display()">
</form>
</body>
It has to be 它一定要是
<script type="text/javascript">
function display()
{
document.getElementById("textField1").value = "abc";
}
</script>
and not 并不是
<script type="javascript">
function display()
{
document.getElementById("textField1").value = "abc";
}
</script>
In case the text field is not having id attribute and having name attribute then, 如果文本字段没有id属性并且具有name属性,那么,
use 采用
document.getElementsByName("name")[0].value="ert";
getElementsByName() returns an array of objects with that specific name,that's why we are using the index 0. getElementsByName()返回具有该特定名称的对象数组,这就是我们使用索引0的原因。
There is nothing wrong with your code, it works fine in this fiddle . 您的代码没有任何问题,它可以在这个小提琴中正常工作。
I only speculate, but you could try to either delete the type attribute of the script-tag, or change it to type="text/javascript"
which would be the proper type to use. 我只推测,但您可以尝试删除脚本标记的type属性,或将其更改为type="text/javascript"
,这将是正确使用的类型。 If you don't specify it, the browser will consider it as JavaScript by default. 如果您不指定它,浏览器会默认将其视为JavaScript。
它实际上是正确的,但如果它不起作用,请尝试这样:
document.getElementById("textfield1").innerHtml = "ABC";
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