属性的对象 *注意table和tr对象中间有空格，表示从属关系 */ $('table:eq(0) tr:even').css("background","red"); }); $('#b2').click(function(){ $('table:eq(0) tr:odd').css("background","green"); }); $('#b3').click(function(){ $('table:eq(1) td:even').css("background","red"); }); $('#b4').click(function(){ $('table:eq(1) td:odd').css("background","green"); }); $('#b5').click(function(){ $('table:eq(2) td:even').css("background","green"); });