In this article I will explain with an example, how to validate at-least one TextBox from multiple TextBoxes in jQuery.
HTML Markup
The HTML Markup consists of multiple HTML TextBoxes, HTML SPAN element and a Button.
<table>
<tr>
<th colspan="2">Address Proofs (At-least one)</th>
</tr>
<tr>
<td>Passport Number</td>
<td>
<input id="txtPassport" type="text" />
</td>
</tr>
<tr>
<td>Aadhar Number</td>
<td>
<input id="txtAadhar" type="text" />
</td>
</tr>
<tr>
<td>PAN Number</td>
<td>
<input id="txtPAN" type="text" />
</td>
</tr>
<tr>
<td colspan="2">
<span id="lblMessage" style="color: Red; visibility: hidden;">
Please enter at-least one Address proof.
</span>
</td>
</tr>
<tr>
<td></td>
<td>
<input id="btnSubmit" type="button" value="Submit" />
</td>
</tr>
</table>
Implementing validation using jQuery
Inside the jQuery document ready event handler, the Button has been assigned a Click event handler.
Inside the Click event handler, first the TextBoxes are referenced and their values are fetched in respective labels.
Then, a check is performed one by one for each value of Passport number, Aadhar number and PAN number respectively. If at-least one of them has value then the validation is passed else the validation fails.
The isValid variable set to True or False based on whether the validation is passed or failed respectively.
Finally, based on the isValid variable, the result is displayed in the HTML SPAN element.
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
$(function () {
$("#btnSubmit").on("click", function () {
//Referencing and fetching the TextBox values.
var passport = $("#txtPassport").val();
var aadhar = $("#txtAadhar").val();
var pan = $("#txtPAN").val();
var isValid = false;
//Check if Passport Number is not blank.
if (passport.trim() != "") {
isValid = true;
}
//Check if Aadhar Number is not blank.
if (aadhar.trim() != "") {
isValid = true;
}
//Check if PAN Number is not blank.
if (pan.trim() != "") {
isValid = true;
}
//Show or hide HTML SPAN based on IsValid variable.
$("#lblMessage").css("visibility", !isValid ? "visible" : "hidden");
});
});
</script>
Screenshot
![Validate At-least one TextBox from Multiple TextBoxes using JQuery]()
Browser Compatibility
The above code has been tested in the following browsers.
![Internet Explorer]()
![FireFox]()
![Chrome]()
![Safari]()
![Opera]()
* All browser logos displayed above are property of their respective owners.
Demo
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