The back() method is used to load the URL for the previously visited Web site.
<html>
<head>
<title> Using the back method of the History object</title>
</head>
<body>
<form name=form1>
Click on the button to go back to the previous page.
<input type="button" value="Go Back" onClick='window.history.back()'>
</form>
</body>
</html>