How to make textbox attribute true in onchange event in javascript?

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Javascript

how to make textbox2 required(true) onchange of textbox1 in javascript?

Please let me know on this.

Posted 16-Dec-11 17:17pm

nitendrasingh

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thatraja 17-Dec-11 0:34am

Confusing little bit. Elaborate more.

Rajesh Anuhya 2-Jan-12 6:40am

Not Clear.., can you elaborate it more...

2 solutions

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Ankur^\m/ · Answer 1 · 2012-01-02T00:44:00

The simplest solution would be to validate the form before you submit it.
Call a javascript method on submit of the form which will -
First check if the value of TextBox1 is empty or not. In case it has some value, it will check the value of second TextBox. If it is empty, an alert or error message will be fired.

You get the text in a TextBox in JavaScript using this syntax -
var TextBoxValue = document.getElementById("TextBoxID").value;

I will leave the rest part of writing code to you. Let me know if you have any issues.
Hope it helps!

Jamal Seyedi · Answer 2 · 2012-01-02T00:29:00

Solution 1

XML

<input type=checkbox id=ch>

<script>

    document.getElementById("ch").checked = true;

</script>

Posted 2-Jan-12 0:29am

Jamal Seyedi