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PHP交流群:294088839, Python交流群:652376983 function timeD(){ var num=$(".goTel").text()-0; console.log(num); num--; if(num==0 || isNaN(num)){ console.log('进来了'); $(".goTel").html('发送'); clearTimeout(t) }else{ $(".goTel").text(num); } } t = setInterval(timeD,1000)