Skip to main content

Accept only number in a text box in JavaScript

similar:
1) Allowing only certain character in a text box.
2) Validation in TextBox which accepts only numbers value.
3) Allow only numbers / digits in TextBox.

Here is the code bellow
for the text box where digits are allowed and alphabetic characters are not allowed. Observe, too, that arrow keys and backspace _are_ allowed so that you can still edit what you type.

Copy and paste java script code inside <head> tag and call the java script function on text box onkeypress event as given bellow.

Here is the two example you can try any of them all are working fine in all browsers IE,Netscape/Mozilla.


<script type="text/javascript">
    function fnAllowNumeric() {
      if ((event.keyCode < 48 || event.keyCode > 57) && event.keyCode != 8) {
          event.keyCode = 0;
          alert("Accept only Integer..!");
          return false;
      }
    }
</script>

<body>
  <input id="txtChar" onkeypress="return fnAllowNumeric()" type="text" />
</body>



<script type="text/javascript">
    function CheckNumericValue(e) {
       var key = e.which ? e.which : e.keyCode;
       //enter key  //backspace //tabkey      //escape key                  
       if ((key >= 48 && key <= 57) || key == 13 || key == 8 || key == 9 || key == 27) {
           return true;
       }
       else {
           alert("Please Enter Number Only");
           return false;
       }
    }
</script>

<body>
 <input id="txtChar" onkeypress="return CheckNumericValue(event)" type="text" />
</body>


Popular posts from this blog

Merging multiple PDFs using iTextSharp in asp.net c#

In this article i will show you how to merge multiple pdfs into one using ITextSharp below is the two approach one is to pass your input files path, output file path (will be created if not exist) and another is pass direct input stream, output stream and it will write the merge files into output stream.

Uploading large file in chunks in Asp.net Mvc c# from Javascript ajax

Often we have a requirement to upload files in Asp.net, Mvc c# application but when it comes to uploading larger file, we always think how to do it as uploading large file in one go have many challenges like UI responsiveness, If network fluctuate for a moment in between then uploading task get breaks and user have to upload it again etc.

how $document.ready() is different from window.onload()

we often use window.onload() in javascript and $document.ready() in jquery and assume that both are same just jquery library wrap up javascript window.onload() and introduce $document.ready() but no there is much difference between them below is the explanation -

How to handle click event of linkbutton inside gridview

Recently I have posted how to sort only current page of gridview, Scrollble gridview with fixed header through javascript, File upload control inside gridview during postback and now i am going to explain how to handle click event of linkbutton or any button type control inside gridview.

We can handle click event of any button type control inside gridview by two way first is through event bubbling and second one is directly (in this type of event handling we need to access current girdviewrow container)