javascriptvalidation for space

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Hi I want to make a javascript function that will prompt user to put space after 25 characters.Means it will be necessary for user to put space after 25 characters in a textbox which has total length of 58.

Waiting

Till now m using this

JavaScript

function nospaces(t){
  if(t.value.match(/\s/g)){
    alert('Sorry, you are not allowed to enter any spaces');
    t.value=t.value.replace(/\s/g,'');
  }
}

HTML

<input type="text" maxlength="58" name ="textbox" id="textbox" onkeyup="nospaces(this)">

but what it does ,it does not allow any space

ANy Help

Posted 17-Jul-12 2:11am

khan46

Updated 17-Jul-12 2:27am

StianSandberg

v3

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StianSandberg · Answer 1 · 2012-07-17T02:20:00

JavaScript

function isValid(e){
   var value = e.value;

   // check if value is null
   if(value==null) {
     alert('value is null');
     return false;
   }

   // check if value is exact 58 characters long
   if(value.length!=58) {
     alert('value is not 58 characters long');
     return false;
   }

   // check if character 25 is a space
   if(value.substring(25,26)!=' ') {
     alert('character 26 is not a space');
     return false;
   }

   return true;
}

HTML

<input type="text" maxlength="58" name ="textbox" id="textbox" onblur="isValid(this)">

Rahul Rajat Singh · Answer 2 · 2012-07-17T02:34:00

Solution 2

Try this:

the aspx markup for button

XML

<asp:TextBox ID="TextBox1" runat="server" onkeypress="return checkSpace(this);" Width="485px" MaxLength="58"></asp:TextBox>

and the javaScript to achieve what you want

JavaScript

function checkSpace(sender)
   {
       var data = sender.value;

       if(data.length == 25 && data.substring(25,26) != ' ')
       {
           alert('please enter space now');
            return false;
       }
   }

I tested it on my end and it is working fine. Let me know if it works on your end too. if not I will try to refine my answer.

Posted 17-Jul-12 2:34am

Rahul Rajat Singh

Comments

khan46 17-Jul-12 8:50am

Its not working

Rahul Rajat Singh 17-Jul-12 8:56am

What is the problem now. Tell me what is happening.

khan46 17-Jul-12 9:02am

it is allowing character after 25. I need a prompt to say that you must put a space after 25 characters

StianSandberg 17-Jul-12 8:52am

Isn't a little annoying getting a prompt while typing? Maybe a better solution is to automatically insert a space after 25 characters.. just a thought.

StianSandberg 17-Jul-12 8:54am

changed my own solution as it was giving a prompt after each keyup ;)

khan46 17-Jul-12 9:03am

if u can do this way then plz share

StianSandberg 17-Jul-12 9:08am

onkeyup="putSpace()"

function putSpace(e){
var value = e.value:
if(value.length==25)
e.value += ' ';
}
Have not tried it, but think it will work...

Prosan · Answer 3 · 2012-07-17T02:48:00

Solution 3

look these articles on regular expression
Article1[^]
Article2[^]
Article3[^]
Article4[^]

Posted 17-Jul-12 2:48am

Prosan

Updated 17-Jul-12 2:51am

v2

javascriptvalidation for space

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