function checkEmailAddress(textBox, chkValue) {
    //alert(textBox.value);
    if (textBox.value == "" || textBox.value == chkValue) {
        alert("Please enter an email address");
        return false;
    }
    return true;
}

function replaceText(txtBox, txtRpl) {
    if (txtRpl == txtBox.value) {
        txtBox.value = "";
    }
}