// JScript File
function letter(e)
{
    var key;
    var keychar;
    if (window.event)
    key = window.event.keyCode;
    else if (e)
    key = e.which;
    else
    return true;
    keychar = String.fromCharCode(key);
    keychar = keychar.toLowerCase();
    // control keys
    if ((key==null) || (key==0) || (key==8) ||(key==9) || (key==13) || (key==27) || (key==45) || (key==39) ||(key==32))
    return true;
    // alphas 
    else if ((("abcdefghijklmnopqrstuvwxyz").indexOf(keychar) > -1))
    return true;
    else
    return false;
}

function number(e)
{
    var key;
    var keychar;
    if (window.event)
    key = window.event.keyCode;
    else if (e)
    key = e.which;
    else
    return true;
    keychar = String.fromCharCode(key);
    // control keys
    if ((key==null) || (key==0) || (key==8) ||(key==9) || (key==13) || (key==27) )
    return true;
    // numbers
    else if
         ((("0123456789").indexOf(keychar) > -1))
    return true;
    else
    return false;
}