//上下滚动 var textRoll=function(){ $('#notice p:last').css({'height':'0px','opacity': '0'}).insertBefore('#notice p:first').animate({'height':'35px','opacity': '1'}, 'slow', function() { $(this).removeAttr('style');});                                } $(function(){ //触发上下文字滚动事件 var roll=setInterval('textRoll()',4000); $("#notice p").hover(function() {                                 clearInterval(roll);                              }, function() {                                  roll = setInterval('textRoll()', 4000)                             });             });