JS定时器的使用--延时提示框

<title>无标题文档</title>
<style>
div{float:left;margin:10px;}
#div1{width:50px; height:50px; background:red;}
#div2{width:200px; height:200px; background:#999;}
</style>
<script>
window.onload=function ()
{
    var oDiv1=document.getElementById('div1');
    var oDiv2=document.getElementById('div2');
    var timer=null;
    
/*    oDiv1.onmouseover=function (){
        clearTimeout(timer);
        oDiv2.style.display='block';
        }
    oDiv1.onmouseout=function ()
    {
        timer=setTimeout(function(){
                             oDiv2.style.display='none';
                             },500);
    }
    oDiv2.onmouseover=function (){
        clearTimeout(timer);
        }
    oDiv2.onmouseout=function (){
        timer=setTimeout(function (){
                                     oDiv2.style.display='none';
                                     },500);
        
        }*/
        oDiv1.onmouseout=oDiv2.onmouseout=function (){
        timer=setTimeout(function (){
                                     oDiv2.style.display='none';
                                     },500);
        };
        oDiv1.onmouseover=oDiv2.onmouseover=function (){
        clearTimeout(timer);
        oDiv2.style.display='block';
        };
};
</script>
</head>

<body>
<div id="div1"></div>
<div id="div2"></div>
</body>

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原文地址：https://www.cnblogs.com/919czzl/p/4314083.html