onclick checkbox getting disabled in IE9

i have 5 checkbox on my page whenever i click on first checkbox other checkbox  becomes hidden its only issue with IE9 on chrome its working proper.
Plz suggets. in javasricpt i m using below code to uncheck the other checkboxes ...........which is making other checkbox hidden when i check on first checkbox
var $tblChkBox = $("table.cbl input:checkbox"); // add a click handler to each checkbox $tblChkBox.click(function () { // get the id of the selected checkbox var selectedId = this.id;
 $tblChkBox.each(function () {
      if (this.id != selectedId) this.checked = false;
    }); });




<asp:Label ID="lblRequirement" runat="server" Text=" Requirement "></asp:Label> <div class="divOptions"> <asp:CheckBoxList ID="cblOptions" ru ...