You create a custom page layout that contains the following code segment. (Line numbers are

included for reference only.) 01Please enter a number:
02<SharePointWebControls:InputFormTextBox ID=”NumberTextBox” runat=”server”/> 03 You
need to prevent the page from being saved if NumberTextBox is empty. Which code segment
should you add at line 03?

A.
<script type=”javascript”>if(document.getElementById(‘NumberTextBox’).value = ”) return
false;</script>

B.
<script type=”javascript”>if(document.getElementById(‘NumberTextBox’).value = ”) return
true;</script>

C.
<SharePointWebControls:InputFormCompareValidator ID=”NumberValidator” runat=”server”
ControlToValidate=”NumberTextBox”/>

D.
<SharePointWebControls:InputFormRequiredFieldValidator ID=”NumberValidator”
runat=”server” ControlToValidate=”NumberTextBox”/>