<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>jQuery实现CheckBox全选、全不选</title> <script src="http://code.jquery.com/jquery-1.4.4.min.js" type="text/javascript"></script> <script type="text/javascript"> $(function() { $("#checkAll").click(function() { $('input[name="subBox"]').attr("checked",this.checked); }); var $subBox = $("input[name='subBox']"); $subBox.click(function(){ $("#checkAll").attr("checked",$subBox.length == $("input[name='subBox']:checked").length ? true : false); }); }); </script> </head> <body> <div> <input id="checkAll" type="checkbox" />全选 <input name="subBox" type="checkbox" />项1 <input name="subBox" type="checkbox" />项2 <input name="subBox" type="checkbox" />项3 <input name="subBox" type="checkbox" />项4 </div> </body> </html>