Regular expression

Hi, I am working on this Javascript program to write a form and I am trying to use regular expression for the name expression and I don't know why this is not working. Could someone pls tell me what is wrong this code?

function validateForm()
{
var firstname = document.getElementById("f_name").value;
var lastname = document.getElementById("l_name").value;
var pcode = document.getElementById("p_name").value;
var address = document.getElementById("add").value;
var phone = document.getElementById("phone").value;

var exp = validateFirstName(firstname);
if(exp == null)
{
alert("no match");
document.getElementById("_fname").style.color = "Red";
}
}

function validateFirstName(txt)
{
var regex = /^[A-Z][a-z]+$/;
return regex.match(txt);
}



O yeah and is there any software I can write Javascript in that isn't notepad or notepad++.. Something that shows me errors and Warnings....

 

Hi Dwizzy,

The 'match' function that are using to compare regular expression, should be invoked as a method of string.
Since you are using a regular expression(regex here) so you can try the 'test' or 'exec' method.
Better using 'test' as it returns true or false, and i think it is what u need.
For your info 'exec' returns an array when atleast a match is found, and else null.

Hope this helps.

 

Sorry, I am not sure I understand what you mean... You see my understanding of a regular expression is a string right... you can basically initialize it as an object or a variable...

 

Find:-

return regex.match(txt);

Code (markup):

Replace With:-

return txt.match(regex);

Code (markup):

 

Regular expressions can be created in two ways:

1.Define it as an instance of the global RegExp object.

2. simply assign it to a variable in literal form (i.e. /......./ )

Hope this solves your query.
Reply if still confusing.