code to find whether only numerals are entered in a text box

[jayakrishnanav]

Hi ,


Can anybody help me with the code , to find whether only numerals are entered in a text box (using js.),at the time of saving.

jk

[chaarmann]

Hi ,


Can anybody help me with the code , to find whether only numerals are entered in a text box (using js.),at the time of saving.

jk

Just put an onKeyUp-event and onChange-event for the text box which calls a javascript function.
Or call this function in your onSubmit() function of your form.
This javascript function, which you can put into your ".js" file, uses a regular expression that checks for digits.
If you do it this way with regExpr., then you can write the function by using only one line of source code.

[gits]

hi ...

a regExp would do the job. in case you only want integers you may use something like the following for it:

// val may be you input-value
var val = '123';
 
// function that checks for numbers - returns true when 
// ok otherwise it returns false (the regExp is literally created
// with /^\d+$/ and checks for numbers from start to end)
function test_value(val) {
    return /^\d+$/.test(val);
}
 
// now we could call the function
alert(test_value(val));
 

kind regards

[jayakrishnanav]

hi frnds,

thanx for ur fast reply! i hv done tat as u said and itz workin!!!

gitz,actually i want to check whether only integers are entered in the field and if there is notin other than integers,then i hv to reject it!I hv done tat using the code u hv given.
Then i need a thing similar to this,tat is i want to check whether only special characters are entered in a textfield?
can u help me in tat?


thanks in advace
jk

[gits]

:) glad to hear that ... for further information you may have a look here
and may be for your next purpose you may use:

/^\W$/

instead of

/^\d$/

kind regards

[jayakrishnanav]

Hi gits,

Thanks again ...by replacing the function as u said,itz now possible to check the existence of special characters only in a textbox.!!!

Takecare!




jk

[gits]

hi ...

that's what you needed ... in't it :) ... post back to the forum anytime you have more questions ...

kind regards

[jayakrishnanav]

hi ...

that's what you needed ... in't it :) ... post back to the forum anytime you have more questions ...

kind regards

hi gits,

Yes thatz exactly wat i needed! Then i ll post my queries in dis forum,when i got any problems.


WarmRegards
jk