web端 - 返回上一步，点击返回，跳转上个页面 JS

<script language="javascript" type="text/javascript"> 
    window.location.href="login.jsp?backurl="+window.location.href; 
</script> 

<script language="javascript"> 
    alert("返回"); 
    window.history.back(-1); 
</script>

<script language="javascript"> 
    window.navigate("top.jsp"); 
</script>

<script language="JavaScript"> 
    self.location=’top.htm’; 
</script>