Question

I am weak in javascript so please help me for a javascript code that will allow user to enter only single character ie A,B,C,D,….,Z.But only a single character and also no numbers.

Answer 1

    <script type="text/javascript">
function fn()
{
    myString=document.getElementById("atext").value;
    patt=/[A-z]/g;
    x=patt.test(myString);
    alert(x);
}
</script>
<input type="text" id="atext" maxlength="1" />

<input type="button" id="btn" onclick="fn()" />