鼠标移到div,浮层显示明细,弹出层与div的上边距左边距重合(示例代码)

时间：2021-01-21 10:56:03|栏目：JavaScript代码|点击：次

如下所示：

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <style type="text/css">
        .toopTip
        {
            background-color:Yellow;
            border-style:solid;
            border-width:1px;
            border-color:Red;
        }
    </style>
   <script language="javascript" type="text/javascript">
       /*
            如果希望提示的div的左边界与上边界与显示的div重叠，那么需要删除文档头W3C标准
            <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
             "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

       */
       function initEvent() {
           var divArray = document.getElementsByTagName("div");
           for (var i = 0; i < divArray.length; i++) {
               divArray[i].onmouseover = createDivDetailOne;
               /*
                 无法用原始的div绑定鼠标移走的事件,因为明细的div的宽度长度都要大于原始div，
                 这样原始的div就被覆盖了，此时会自动触发onmouseout事件
               */
               //divArray[i].onmouseout = removeDivDetail;
           }
       }
       function createDivDetailOne() {
           //保证divDetail div的唯一性
           var divDetail = document.getElementById("divDetail");
           if(divDetail)
           {
               document.body.removeChild(divDetail);
           }
           divObj = document.createElement("div");
           divObj.className = "toopTip";
           divObj.setAttribute("id", "divDetail");
           divObj.style.position = "absolute";
           divObj.style.width = "200px";
           divObj.style.height = "100px";
           var triggerObj = window.event.srcElement;
           divObj.style.top = triggerObj.offsetTop;
           divObj.style.left = triggerObj.offsetLeft;
           divObj.innerHTML = triggerObj.innerText;
           document.body.appendChild(divObj);
           //此时用于明细的div已经覆盖了原div，所以覆盖的div要进行事件的处理
           document.getElementById("divDetail").onmouseout = function() {
               divObj = this;
               if (!divObj) {
                   return;
               }
               document.body.removeChild(divObj);
           };
       }
       function removeDivDetail() {
           var divObj = document.getElementById("divDetail");
           if (!divObj) {
               return;
           }
           document.body.removeChild(divObj);
       }

window.onload = initEvent;
</script>

</head>
<body>
    <div id="divOne" style="background-color: Fuchsia; width: 100px; height: 100px;" >
        Hello My Js World!
    </div>
    <div id="divTwo" style="background-color: Aqua; width: 100px; height: 100px">
        Welcome to My Js World!
    </div>
    <div id="divThree" style="background-color: Gray; width: 100px; height: 100px">
        THIS IS My Js World!
    </div>
</body>
</html>

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