js延时提示框效果演示：
实现方法
移入显示，移出隐藏
移除延时隐藏，可以实现从第一个div移入第二个div，仍然可以显示
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" ""> <html xmlns=""> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> </head> <style> #div1 { width: 50px; height: 50px; background: red; float: left } #div2 { margin-left: 10px; width: 250px; height: 150px; background: yellow; float: left; display: none } </style> <script> window.onload=function() { var oDiv1=document.getElementById('div1'); var oDiv2=document.getElementById('div2'); var timer=null; oDiv1.onmouseover=oDiv2.onmouseover=function() { clearTimeout(timer); oDiv2.style.display='block'; }; oDiv1.onmouseout=oDiv2.onmouseout=function() { timer=setTimeout(function() { oDiv2.style.display='none';} ,500); }; }; </script> <body> <div id="div1"></div> <div id="div2"></div> </body> </html>