代码如下：

<div class="container-fluid"> <div class="main-content-inner"> <div class="page-content"> <div class="page-header"> <form class="form-inline" id="searchform"> <div class="form-group" style="margin-left: 10px;"> <label>分</label> <input type="text" class="form-control" name="Minute" id="Minute"> </div> <div class="form-group" style="margin-left: 10px;"> <label>秒</label> <input type="text" class="form-control" name="Second" id="Second"> </div> <button type="button" class="btn btn-purple btn-sm" onclick="ok()"> 开始 </button> </form> </div> <div class="row" style="height:500px;line-height:500px;vertical-align:middle;font-size:200px;color:red;text-align:center;margin-top:100px"> <p id="listview"></p> </div> </div> </div> </div> <script> var t; var Minute; var Second; var d; function ok() { if ($("#Minute").val() == "0" || $("#Minute").val() == "") { Minute = 0; } else { Minute = $("#Minute").val(); } if ($("#Second").val() == "0" || $("#Second").val() == "") { Second = 0; } else { Second = $("#Second").val(); } var min = ""; if (Minute < 10) { min = "0" + Minute; } else { min = Minute + ""; } var sec = ""; if (Second < 10) { sec = "0" + Second; } else { sec = Second + ""; } $("#listview").text(min + ":" + sec); $(".page-header").hide(); $("#listview").show(); setTimeout(function () { begin() }, 1000); } function begin() { if (Second != 0) { Second--; min = ""; if (Minute < 10) { min = "0" + Minute; } else { min = Minute + ""; } sec = ""; if (Second < 10) { sec = "0" + Second; } else { sec = Second + ""; } $("#listview").text(min + ":" + sec); } else { if (Minute > 0) { Minute--; Second = 59; min = ""; if (Minute < 10) { min = "0" + Minute; } else { min = Minute + ""; } sec = ""; if (Second < 10) { sec = "0" + Second; } else { sec = Second + ""; } $("#listview").text(min + ":" + sec); } else { clearTimeout(t); } } t = setTimeout(function () { begin() }, 1000) } </script>

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