how to filter alphanumeric in js

[sudhaMurugesan]

Hi all,
Do anyone know the code to filter alphanumeric characters alone during keypress event. I've tried but its allowing special characters like ! for 1 , @ for 2 etc.
My code is

function FilterAlphaNumeric()
  { 
    if((57>=event.keyCode && event.keyCode>=48) 
        || (105>=event.keyCode && event.keyCode>=96) 
        || (90>=event.keyCode && event.keyCode>=65) 
        || (40>=event.keyCode && event.keyCode>=37)
        || (event.keyCode == 8) || (event.keyCode == 46)  
        || (event.keyCode == 13) || (event.keyCode == 32))
    {
      event.returnValue=true;
    }
    else
    {
    event.returnValue = false;
    }
  }

[Ferris]

Hi

I think you need to add a shiftKey test...

[HTML]
function FilterAlphaNume ric()
{
if(event.shiftK ey)
{
if(90>=event.ke yCode && event.keyCode>= 65) //you can press shiftkey when input alpha.
{
event.returnVal ue=true;
}
else
{
event.returnVal ue = false;
}
}
else
{
if((57>=event.k eyCode && event.keyCode>= 48)
|| (105>=event.key Code && event.keyCode>= 96)
|| (90>=event.keyC ode && event.keyCode>= 65)
|| (40>=event.keyC ode && event.keyCode>= 37)
|| (event.keyCode == 8) || (event.keyCode == 46)
|| (event.keyCode == 13) || (event.keyCode == 32))
{
event.returnVal ue=true;
}
else
{
event.returnVal ue = false;
}
}
}

[/HTML]

[dmjpro]

Hi all,
Do anyone know the code to filter alphanumeric characters alone during keypress event. I've tried but its allowing special characters like ! for 1 , @ for 2 etc.
My code is

function FilterAlphaNumeric()
  { 
    if((57>=event.keyCode && event.keyCode>=48) 
        || (105>=event.keyCode && event.keyCode>=96) 
        || (90>=event.keyCode && event.keyCode>=65) 
        || (40>=event.keyCode && event.keyCode>=37)
        || (event.keyCode == 8) || (event.keyCode == 46)  
        || (event.keyCode == 13) || (event.keyCode == 32))
    {
      event.returnValue=true;
    }
    else
    {
    event.returnValue = false;
    }
  }

try this ...

[code=javascript]
if((57>=event.k eyCode && event.keyCode>= 48)
|| (105>=event.key Code && event.keyCode>= 96)
|| (90>=event.keyC ode && event.keyCode>= 65)
|| (40>=event.keyC ode && event.keyCode>= 37)
|| (event.keyCode == 8) || (event.keyCode == 46)
|| (event.keyCode == 13) || (event.keyCode == 32))
{
//event.returnVal ue=true;
}
else
{
//event.returnVal ue = false;
event.keyCode = 0;
}
[/code]

Debasis

[sudhaMurugesan]

try this ...

[code=javascript]
if((57>=event.k eyCode && event.keyCode>= 48)
|| (105>=event.key Code && event.keyCode>= 96)
|| (90>=event.keyC ode && event.keyCode>= 65)
|| (40>=event.keyC ode && event.keyCode>= 37)
|| (event.keyCode == 8) || (event.keyCode == 46)
|| (event.keyCode == 13) || (event.keyCode == 32))
{
//event.returnVal ue=true;
}
else
{
//event.returnVal ue = false;
event.keyCode = 0;
}
[/code]

Debasis

I tried urs but cant c any difference. I am trying to find the keycodes and then restricting it.

[sudhaMurugesan]

I tried urs but cant c any difference. I am trying to find the keycodes and then restricting it.

if((57>=event.keyCode && event.keyCode>=48) 
        || (122>=event.keyCode && event.keyCode>=96) 
        || (90>=event.keyCode && event.keyCode>=65)         
        || (event.keyCode == 8) //|| (event.keyCode == 46) for dot 
        || (event.keyCode == 13) || (event.keyCode == 32))
    {
      event.returnValue=true;
    }
    else
    {
    event.returnValue = false;

    }

I got it. I found the keycodes by pressing each key and then filtered only the required. It worked. Thanks for Ferris and Debasis for your outputs.

[gits]

hi ...

is there a very urgend reason why not checking the input after it was done (validate the input field's value after change), this would be much easier and what about different keyboard-layouts? could it be that there would be a never ending story with checking keypress during input?

kind regards

[sudhaMurugesan]

hi ...

is there a very urgend reason why not checking the input after it was done (validate the input field's value after change), this would be much easier and what about different keyboard-layouts? could it be that there would be a never ending story with checking keypress during input?

kind regards

Hi Gits,
You answered me in many queries that i've posted.If i troubled you this time, I really regret for it. Sorry, I'll not let it happen again.

[gits]

Hi Gits,
You answered me in many queries that i've posted.If i troubled you this time, I really regret for it. Sorry, I'll not let it happen again.

hi ... no you didn't ... its just a question ... could you tell me the reason? you got it to work, so you have an answer, but i only thought that it could be better to use a simple solution since i don't know what happens to the solution with different keyboard-layouts, or may be that is not issue for you? or even an issue at all ... since i'm not sure about this? ... as i said ... it was just a thought, a question ... nothing more ;) ...

kind regards