var allItems = $ ( "div.item" ); var keepList = $ ( "div#container1 div.item" ); //现在你可以继续使用这些jQuery对象来工作了。例如, //基于复选框裁剪“keep list”,复选框的名称 //符合 < DIV >class names: $ ( formToLookAt + " input:checked" ).each ( function() { keepList = keepList.filter ( "." + $ ( this ).attr ( "name" ) ); } ); < /DIV>