nbsp;html>


 <meta>
 <title>Title</title>
 <style>
  #pbox{
   width: 100%;
   height:100%;
  }
  #box{
   width: 200px;
   height: 200px;
   background:red;
   position: absolute;
  }
 </style><input><p>
</p><p>
</p>


<script>
 var btn=document.getElementById("btn");//获取按钮
 var box=document.getElementById("box");//获取box
 var pbox=document.getElementById("pbox");//获取pbox
 var arr=[&#39;#fff143&#39;,&#39;#ff7500&#39;,&#39;#a3d900&#39;,&#39;#eedeb0&#39;,&#39;#ae7000&#39;,&#39;#b35c44&#39;,&#39;#392f41&#39;,&#39;#ff461f&#39;,&#39;#44cef6&#39;,&#39;#edd1db&#39;,&#39;#003371&#39;];//随机颜色
 //给btn注册点击事件ain
 btn.onclick=function(){
   pbox.innerHTML="";//清空pbo
  for(var i=0;i<=10;i++){
   var newTip =box.cloneNode(true);
   pbox.appendChild(newTip);
   var left=parseInt(Math.random()*(900-100+1) + 100);//随机生成左边距
   var top=parseInt(Math.random()*(500-100+1) + 100);//随机生成上边距
   var bg=Math.floor((Math.random()*arr.length));//生成数组随机数获得随机数组下标
   box.style.background=arr[bg];//设置颜色
   box.style.top=top+"px";//设置上边距
   box.style.left=left+"px";//设置左边距
  }
  var c=pbox.children;
  for(var i=0;i< c.length;i++){
   c[i].onmousedown=function (e) {
//     alert(this.offsetLeft);
    var spacex=e.pageX-this.offsetLeft;
    var spacey=e.pageY-this.offsetTop;
    this.onmousemove=function (e) {
     this.style.left=e.pageX-spacex+"px";
     this.style.top=e.pageY-spacey+"px";
    }
   };
   c[i].onmouseup=function () {
    this.onmousemove=null;
   }
  }
 }
</script>