.net - Accessing The Sibling Of A Checkbox Using Jquery?

I am acessing the sibling of a checkbox using parentNode.nextElementSibling.value;It will returns value and works fine in Firefox.But in IE it is saying Object is null and saying

Microsoft JScript runtime error: 'parentNode.nextElementSibling.value' is null or not an object

My function is as follows

function chkEnergy() {
var inputs = $('.check input');
var count = 0;var ok = 1;[code]....

I uses this way to have dataList where checkbox and textbox were there

<asp:DataList ID="dlstEnergyItems" runat="server" RepeatColumns="4" RepeatDirection="Horizontal" Width="100%">
<ItemTemplate>
<asp:CheckBox ID="cbEnergyItems" runat="server" CssClass="check" />[code]....