Number Validation Using JavaScript

Here I explain, how to perform number validation using pur javascript method. The values of the Number field textbox is compared using isNaN() inbuilt function in JavaScript .If the values do not numeric values an error message is displayed like ‘Enter Numeric value only’. If the values are numeric then display the sucess message will display.We can performe these operations by pure php code or javascript with jquery also.

Full Code

Number: 

The Action perform on form submit. Call the test_number() function at onsumit event handler. When the Button is clicked, the Validate JavaScript function gets executed.

Inside the Validate JavaScript function(test_number()), the values of the number field textboxe is fetched and are compared.If the values do not numeric values an error message is displayed like ‘Enter Numeric value only’. If the values are numeric then display the sucess message will display.