function chkform() {
        if (emptyField(document.form2.txtnm)) {
            alert("Please Enter Name");
            document.form2.txtnm.focus();
            return false;
        }
        if (emptyField(document.form2.txtmail)) {
            alert("Please Enter Email.");
            document.form2.txtmail.focus();
            return false;
        }
        if (!validEmailId(document.form2.txtmail.value)) {
            alert("Please Enter Valid Email Id.");
            document.form2.txtmail.focus();
            return false;
        }
    }