<script type="text/javascript">

window.onload = function(){
var left = document.getElementById("left");
var right = document.getElementById("right");
var rpic = document.getElementById("rpic");
var Box = document.getElementById("Box");
var cover = document.getElementById("cover");

// 给左侧加鼠标移动事件
cover.onmousemove = function(){

  //获得事件对象
  var ev = window.event;
  var mouse_left = ev.offsetX || ev.layerX;
  var mouse_top = ev.offsetY || ev.layerY;
  // document.title = mouse_left + '|' + mouse_top;

  //计算色块的位置
  var <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>_left = mouse_left - 100;
  var <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>_top = mouse_top - 100;

  // 判断是否超出
  if (<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>_left < 0) {
    box_left = 0;
  }
  if (box_left > 200) {
    <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>_left = 200;
  }
  if (<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>_top < 0) {
    box_top = 0;
  }
  if (box_top > 200) {
    <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>_top = 200;
  }

  // 让色块移动
  <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.style.left = <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>_left + 'px';
  <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.style.top = <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>_top + 'px';

  //计算右侧<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>位置
  var rpic_left = <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>_left*-2;
  var rpic_top = <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>_top*-2;

  // 让右侧移动
  rpic.style.left = rpic_left + 'px';
  rpic.style.top = rpic_top + 'px';

}

  //给左侧加鼠标移入事件
  cover.onmou<a href="https://www.jb51.cc/tag/SEO/" title="SEO">SEO</a>ver = function(){
    // 让左侧色块和右侧隐藏
    <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.style.display = 'block';
    right.style.display = 'block';
  }

  // 给左侧加鼠标移出事件
  cover.onmou<a href="https://www.jb51.cc/tag/SEO/" title="SEO">SEO</a>ut = function(){
    // 让左侧色块和右侧隐藏
    <a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.style.display = 'none';
    right.style.display = 'none';
  }

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程之家。