JavaScript not setting ASP.NET RadioButtonList in IE, but works fine in FireFox

The JavaScript function "selects" the first ListItem in the RadioButtonList radBarrier if the first ListItem in radBarrier is selected, otherwise it unselects it.

* This works fine in FireFox v40.x and IE 11 with Compatibility View on.
** With Compatibility View off in IE 11, the selection works fine but the unselection does not work.  
*** I need to make it work in IE 11 without Compatibility View since the 22 Computers where this is displayed are not running in Compatibility view.  Thanks.  :-)

    // This sets "radBarrier" to YES if "radVeteran" 'Veteran' is selected.  Otherwise should unselect radVeteran.
    function SetHaveDisability(QuestionID)
    {
    	var rad = QuestionID;
    	var rbl = document.getElementById(rad);  //  The whole RadioButtonList Control
    	var rbl_0 = document.getElementById(rad + '_0');  //  "Disabled Veteran"
    	if (rbl_0.checked)
    	{
    		document.getElementById("radBarrier_0").checked = true;
    	} else
    	{
    	    document.getElementById("radBarrier_0").checked = false;
    	}
    }

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                        <asp:RadioButtonList ID="radVeteran" runat="server" RepeatDirection="Horizontal" RepeatLayout="Flow" onclick=" SetHaveDisability(this.id); ">
                            <asp:ListItem Value="Veteran" Text="Disabled Veteran" />
                            <asp:ListItem Value="Dependant" Text="Eligible Spouse of a Veteran" />
                            <asp:ListItem Value="Care Giver" Text="Care Giver of an ill, injured, or disabled Veteran" />
                            <asp:ListItem Value="Neither" Text="None of those." />
                        </asp:RadioButtonList>

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                    <asp:RadioButtonList ID="radBarrier" runat="server" RepeatDirection="Horizontal"
                        onclick="ShowHideBarrier(this.id);" RepeatLayout="Flow">
                        <asp:ListItem Value="Yes" Text="Yes" />
                        <asp:ListItem Value="No" Text="No" />
                        <asp:ListItem Value="DA" Text="N/A" />
                    </asp:RadioButtonList>

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