浅谈jQuery添加的HTML,JS失效的问题

$('.provinceList').live('change', function(){ var provinceId = $(this).val(); var obj = $(this); $.post('/yuyue/ajaxCityList', {'provinceId':provinceId}, function(list){   var data = eval( '(' + list + ')' );   if( data . status == 0 )   {     var html = '<option value="">-请选择城市-</option>';     for ( var i=0; i < data . list . length; i++ )     {       html += '<option value="'+ data . list[i] . region_id +'">' + data . list[i] . region_name + '</option>';     }     obj.parent().find("select[name='region_id']").html(html);   } });