how do i get radio-buttons functionality on checkboxes ( only select one )

<table>
	<tr>
		<td>Venue</td>
		<td><input name="Concert" id="concert" class="text" type="text" /></td>
		<td><input type="checkbox" name="Band1" value="BlablaBand1"></td>
		<td><input type="checkbox" name="Band2" value="BlablaBand2"></td>
		<td><input type="checkbox" name="Band3" value="BlablaBand3"></td>
	</tr>
</table>

<table>
	<tr>
		<td>Venue</td>
		<td>[+Concert+]</td>
		<td>[+Band1+]</td>
		<td>[+Band2+]</td>
		<td>[+Band3+]</td>
	</tr>
</table>

<input type="radio" name="Band[]" value="BlablaBand3">

/**
 * Makes checkboxes behave like a radio button group
 *   i.e. only one can be selected at a time
 *
 * @name     radioCheckboxGroup
 * @param    name  field name
 * @author   Sam Collett (http://www.texotela.co.uk)
 * @example  $.radioCheckboxGroup("fieldname");
 *
 */
jQuery.radioCheckboxGroup = function(name)
{
	var x = jQuery("input[@name=" + name + "]");
	x.click(
		function()
		{
			// uncheck every other box with the same name
			x.not(this).each(
				function()
				{
					this.checked = false;
				}
			).end();
		}
	);
}

<html>
<head>
  <script src="http://code.jquery.com/jquery-latest.js"></script>
  
  <script>
  $(document).ready(function(){
      
    /* select first group */
    $("#group-one input:checkbox").click( function () {
        $("#group-one input:checkbox").removeAttr("checked");
        $(this).attr("checked","checked");
    });
    
    /* select second group */
    $("#group-two input:checkbox").click( function () {
        $("#group-two input:checkbox").removeAttr("checked");
        $(this).attr("checked","checked");
    });
  });
  </script>
  <style>
  div { color:red; }
  </style>
</head>
<body>
  <form id="group-one">
    <input type="checkbox" name="newsletter" value="Hourly" />

    <input type="checkbox" name="newsletter" value="Daily" />
    <input type="checkbox" name="newsletter" value="Weekly" />
    <input type="checkbox" name="newsletter" value="Monthly" />
    <input type="checkbox" name="newsletter" value="Yearly" />
  </form>

  <form id="group-two">
    <input type="checkbox" name="newsletter" value="Hourly" />
    <input type="checkbox" name="newsletter" value="Daily" />

    <input type="checkbox" name="newsletter" value="Weekly" />
    <input type="checkbox" name="newsletter" value="Monthly" />
    <input type="checkbox" name="newsletter" value="Yearly" />
  </form>

</body>
</html>