create a textbox that will change value of a text

Question

1.00/5 (2 votes)

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how to create a textbox where users enter a value that will change the result of another text below it.

example

HTML

<form>
<input type="text" value="">
<input type="button" value="Apply" >
</form>
<p>The Value is <value></p>

when the apply button is clicked the <value> will print the value provided by user.

Posted 1-May-15 5:47am

Member 11657400

Updated 1-May-15 5:55am

Thomas Daniels

v2

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Comments

ZurdoDev 1-May-15 12:00pm

Just google for some javascript example of how to get text value and how to get text value. Quite easy.

John C Rayan 1-May-15 12:05pm

Your title is confusing because all you have to do is get the value of textbox using document.getElementById("id_of_textbox").value and assign to the target element. Where do you want to change the value as suggested by your title.

4 solutions

Solution 3

Solution 1 explains what you can do. A convenient way for such manipulation would be using jQuery.

First, you can get the jQuery wrappers of the HTML elements using selectors:
http://api.jquery.com/category/selectors[^].

For example, given the id attributes from Solution 1, you can get

C#

var input = $("#inputTxt");
var button = $("#applyBtn");
var span = $("#value");

Then you can add an event handler and use jQuery .val() to read and write value on button click.

JavaScript

button.click(function(){
    var value = input.val();
    span.val(value);
});

Please see:
https://api.jquery.com/click[^],
http://api.jquery.com/val[^].

If you need to learn jQuery (highly recommended), please see:
http://en.wikipedia.org/wiki/JQuery,
http://jquery.com,
http://learn.jquery.com,
http://learn.jquery.com/using-jquery-core,
http://learn.jquery.com/about-jquery/how-jquery-works (start from here).

—SA

Posted 1-May-15 6:22am

Sergey Alexandrovich Kryukov

Comments

Thomas Daniels 1-May-15 12:30pm

+5

Sergey Alexandrovich Kryukov 1-May-15 12:31pm

Thank you.
—SA

Solution 4

The complete solution is as following.

HTML

<html>
<title>Get Value</title>

<script type="text/javascript">
function ShowValue() {
    document.getElementById('value').innerHTML = document.getElementById("txtBox").value;
}
</script>
<body>

<form>
<input type="text" value="" id="txtBox">
<input type="button" value="Apply" onclick="ShowValue()">
</form>
<p>The Value is <span id="value"></span></p>

</body>
</html>

Posted 1-May-15 8:14am

BD Star

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Thomas Daniels · Accepted Answer · 2015-05-01T06:07:00

You have to use JavaScript[^] for that.

First, wrap the <value> in a span tag and give IDs to the elements. That way you can easily access them from JavaScript:

HTML

<form>
<input type="text" value="" id="inputTxt">
<input type="button" value="Apply" id="applyBtn">
</form>
<p>The Value is <span id="value">[value]</span></p>

Then, add a <script> tag to your head tag, and put the JavaScript code in there. The code will add a click event handler to your button, and when the button is clicked, it will fetch the text from the textbox and put it in the span in the paragraph:

HTML

<script type="text/javascript">
window.onload = function() {
    document.getElementById("applyBtn").onclick = function() {
        var txt = document.getElementById("inputTxt").value;
        document.getElementById("value").textContent = txt;
    };
};
</script>

More information on the used methods in the JavaScript code:

jgakenhe · Accepted Answer · 2015-05-01T06:11:00

This should work for you.

XML

<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<script language="JavaScript">
function ShowMessage() {
    var message =  document.getElementById("text").value;
    document.getElementById('display').innerHTML = "You entered: " + message;
}
</script>
</head>
<body>
<form>
Enter: <input type="text" name="message" id="text">
</form>
<input type="submit" onclick="ShowMessage();"><br />
<span id="display"></span>
</body>
</html>

create a textbox that will change value of a text

4 solutions

Solution 1

Solution 3

Solution 2

Solution 4

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