利用jQuery兑现一键全选

<script type="text/javascript">

  		$("document").ready(function(){

			$("input#select").click(function(){

				$("input[type=checkbox]").attr("checked",$("input#select").attr("checked"));

			});

  	  	});

 </script>

?

    <table border="1">

    	<tr class="bg">

    		<td><input type="checkbox" id="select" /></td>

    		<td>选择全部</td>

    	</tr>

    	<tr>

    		<td><input type="checkbox" /></td>

    		<td>选项一</td>

    	</tr>

    	<tr>

    		<td><input type="checkbox" /></td>

    		<td>选项二</td>

    	</tr>

    	<tr>

    		<td><input type="checkbox" /></td>

    		<td>选项三</td>

    	</tr>

    </table>