validating text entered in text box

[ravindarjobs]

Hi friends,

i am using .net 2005 but we dont use validation controls.
my requirement is that i have to limit user entering only alpha values in "first name" and "last name" fields.

the page has some text box and a submit button.
on clicking the submit buttion the validation must be done in java script.

how can i limit user to my requirement?


thank you

[ravindarjobs]

i have used this code. It is working a bit fine.

 var regexAlpha=/[a-zA-z]/;
    if(!regexAlpha.test(document.getElementById('ctl00_DefaultContent_txtFristName').value.trim()))
    {
        alert('First Name Should Contain only Alphabet values');
        return false;
    }

suppose if we enter values liks "2345" in the text box then it is giving error. but if we enter text like "sdfa234234" it is not giving error.

what changes should i make to it to accept only alphabets with spaces?

[acoder]

You need to constrain the whole input:

var regexAlpha=/^[a-z ]+$/i;

The i makes it case-sensitive to match all cases. ^ and $ are start and end match characters.

PS. please use [code] tags when posting code.

[ravindarjobs]

thank you Acoder.

that is a good information.

belive or unbelieve i was blindly working on these regular expressions for more than a day now and i used to think "$" is used for "space".


thank you

[acoder]

No problem at all.

For regular expressions, this is a good resource.