function frmValidate()
{
    var frm   = document.forms[0];
    var email = frm.txtemail.value;
    var uname = frm.txtname.value;
    var msg   = frm.txtcomments.value;

    if( uname == "" || email == "" || msg == "" )
    {
        alert( "All fields are required" );
        return false;
    }
    return true;
}