textbox validation using javascript [Resolved]

Posted by Kranthi under ASP.NET on 11/11/2010 | Points: 10 | Views : 21301 | Status : [Member] | Replies : 8

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i have one textbox for name.it contains alphabetics only...it should not accept whitespace at starting it accept white space after entering any alphabets(examble-hai welcome) using javascript

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Posted by: T.saravanan on: 11/11/2010 [Member] [MVP] Silver | Points: 50

0	Hi, Small changes in my code. function clickButton1() { var sText = document.getElementId("txtText").value; if (event.keyCode == 32 && sText !='') { return true; } else if (event.keyCode < 97 \|\| event.keyCode > 122) { alert("Enter Characters Only"); return false; } } Try the above code.Here txtText is your input value. My suggestion is don't expect exact answer.Refer the code for your guidance and then try your self. Cheers :) Thanks, T.Saravanan Kranthi, if this helps please login to Mark As Answer. \| Alert Moderator

Hi,

Small changes in my code.

function clickButton1()

{

  var sText = document.getElementId("txtText").value;

  if (event.keyCode == 32 && sText !='')

  {

   return true;

  } 

  else if (event.keyCode < 97 || event.keyCode > 122)

  {

   alert("Enter Characters Only");

   return false;

  } 

}

Try the above code.Here txtText is your input value.

My suggestion is don't expect exact answer.Refer the code for your guidance and then try your self.

Cheers :)

Thanks,
T.Saravanan

Kranthi, if this helps please login to Mark As Answer. | Alert Moderator

Posted by: Raja on: 11/11/2010 [Member] Starter | Points: 25

0	User event.KeyCode to find out the code of space and ignore that. Look at the below link that contains several code snippet related with JavaScript that may help you. http://www.dotnetfunda.com/codes/showcatcodes.aspx?start=60&page=6&category=57 Thanks Regards, Raja, USA Kranthi, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Kranthi on: 11/11/2010 [Member] Starter | Points: 25

0	i use this but it doesnt accept whitespace......the keycode for whitespace is 37 where i put that function clickButton1(e1) { if (navigator.appName.indexOf("Microsoft Internet Explorer") > (-1)) { if (event.keyCode < 97 \|\| event.keyCode > 122) { alert("Enter Characters Only"); return false; } } } Kranthi, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: T.saravanan on: 11/11/2010 [Member] [MVP] Silver | Points: 25

0	Hi, If allow white space in your textbox means using this script. The keycode for whitespace is 32 function clickButton1() { if (event.keyCode == 32) { return true; } else if (event.keyCode < 97 \|\| event.keyCode > 122) { alert("Enter Characters Only"); return false; } } For your reference... http://www.geekpedia.com/tutorial138_Get-key-press-event-using-JavaScript.html I think its your requirement. Cheers :) Thanks, T.Saravanan Kranthi, if this helps please login to Mark As Answer. \| Alert Moderator

Hi,

If allow white space in your textbox means using this script. The keycode for whitespace is 32

function clickButton1()

{

  if (event.keyCode == 32)

  {

   return true;

  } 

  else if (event.keyCode < 97 || event.keyCode > 122)

  {

   alert("Enter Characters Only");

   return false;

  } 

}

For your reference...
http://www.geekpedia.com/tutorial138_Get-key-press-event-using-JavaScript.html

I think its your requirement.

Cheers :)

Thanks,
T.Saravanan

Kranthi, if this helps please login to Mark As Answer. | Alert Moderator

Posted by: Kranthi on: 11/11/2010 [Member] Starter | Points: 25

0	my concept is it accept whitespace at middle only.....does not at the start of the charecter......example-kranthi b, but your given code is accept white space at starting Kranthi, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Dora743 on: 11/22/2010 [Member] Starter | Points: 25

0	A sample one (\w+)\s+\1 Dorababu Kranthi, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Chamila on: 3/10/2011 [Member] Starter | Points: 25

0	Check this out for More Validations : http://chamilaw.blogspot.com/2011/03/java-script-validations.html Kranthi, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Madhu.b.rokkam on: 3/10/2011 [Member] [MVP] Bronze | Points: 25

0	function validate1() { var len = document.getElementById("TextBox1").value.length; if (event.keyCode == 32 && len == 0) { document.getElementById("TextBox1").value = ""; alert("Cannot start with a space"); return false; } else if ((event.keyCode > 96 && event.keyCode < 122) \|\| (event.keyCode > 64 && event.keyCode < 92) \|\| event.keyCode == 32) { return true; } else { event.returnValue = false; return false; } } Add this in key press event of text box ... Thanks and Regards Madhu Kranthi, if this helps please login to Mark As Answer. \| Alert Moderator

function validate1() {

            var len = document.getElementById("TextBox1").value.length;

            if (event.keyCode == 32 && len == 0) {

                document.getElementById("TextBox1").value = "";

                alert("Cannot start with a space");

                return false;

            }

            else if ((event.keyCode > 96 && event.keyCode < 122) || (event.keyCode > 64 && event.keyCode < 92) || event.keyCode == 32) {

                return true;

            }

            else {

                event.returnValue = false;

                return false;

            }

        }

Add this in key press event of text box ...

Thanks and Regards
Madhu

Kranthi, if this helps please login to Mark As Answer. | Alert Moderator

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