JavaScript中setTimeout函数的用法与实例

<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="https://www.jb51.net/" />
<title>本站</title>
<style type="text/css"> 
div{ 
 width:200px; 
 height:50px; 
 margin:0px auto; 
 background-color:green; 
 text-align:center; 
 line-height:50px; 
 color:red; 
} 
</style> 
<script type="text/javascript"> 
function tishi(){ 
 alert("大家好欢迎来到本站"); 
} 
setTimeout(tishi,5000) 
</script> 
</head> 
<body> 
<div>五秒弹出一个对话框</div> 
</body> 
</html>