Question

I am facing problem in validation. It is working in google chrome, but not in Mozilla.

Like: I have a form where Name: ____ .

I want to put a validation so that the user can’t write a numeric value.

Inside the javascript:

function checkerFunction1(e)
{
    var charCode1=e.which || e.keyCode;
    if((charCode1 >= 65 && charCode1 <= 90) ||(charCode1 >= 97 && charCode1 <= 122) ||(charCode1==32 || charCode1==8 || charCode1==46))
        return true;
    return false;
}     

Inside the jsp page:

<input type="text" value="Name" onkeypress="return checkerFunction1(window.event)"/>

Why it is not working in Mozilla?

Answer 1

This should fix it:

function checkerFunction1(e)
{
    e = e || window.event;
    var charCode1=e.which || e.keyCode;
    return ((charCode1 >= 65 && charCode1 <= 90) ||(charCode1 >= 97 && charCode1 <= 122) ||(charCode1==32 || charCode1==8 || charCode1==46))
} 

The condition in the if‘s brackets is a boolean already. The if is not needed when you want to return a true or false, you were basically saying:

if(true)
    return true;
else
    return false;

Firefox was telling me “e is undefined”
You’ll need to use the event object for that browser (as seen above)

preventDefault() is not needed. Returning false will prevent Firefox from entering a false key into the field.