使用jQuery方法获取当前日期和时间!（时钟显示功能）

可以使用如下代码来获取当前日期和时间，并实现时钟显示功能：

$(document).ready(function() {
  function displayClock() {
    var currentTime = new Date();
    var hours = currentTime.getHours();
    var minutes = currentTime.getMinutes();
    var seconds = currentTime.getSeconds();
    var month = currentTime.getMonth() + 1;
    var day = currentTime.getDate();
    var year = currentTime.getFullYear();

    // add leading zero to minutes and seconds if less than 10
    minutes = (minutes < 10 ? "0" : "") + minutes;
    seconds = (seconds < 10 ? "0" : "") + seconds;

    // determine AM or PM string
    var meridiem = (hours < 12) ? "AM" : "PM";

    // convert hours from military time to standard time
    hours = (hours > 12) ? hours - 12 : hours;
    hours = (hours == 0) ? 12 : hours;

    // display time and date
    var currentTimeString = month + "/" + day + "/" + year + " " + hours + ":" + minutes + ":" + seconds + " " + meridiem;
    $("#clock").html(currentTimeString);
  }

  // call displayClock function every second to update time
  setInterval(displayClock, 1000);
});

在HTML中添加一个元素用于显示时间：

<div id="clock"></div>

这样就可以实现一个简单的时钟显示功能了。