$(function(){ ????var?timer?=?setInterval(function(){run()},400); ????var?onOff?=?true; ????$('button').click(function(){ ????????if(onOff){ ????????????clearInterval(timer); ????????????$(this).html('開始'); ????????????onOff?=?false; ????????????//console.log(onOff) ????????}else{ ????????????setInterval(function(){run()},400); ????????????$(this).html('停止'); ????????????onOff?=?true; ????????????//console.log(onOff) ????????} ????}); ????function?run(){console.log(Math.random())} })<button>停止</button>想要做個點擊按鈕停止輸出隨機數，再按按鈕開始輸出隨機數，再按停止，再按開始……的功能?？墒前戳说谌尉蜔o效了。