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.