下面两句中都可以实现:
<input type="button" name="Submit" value="返回" onclick="javascript:history.back()" />
<input type="button" name="Submit" value="返回" onclick="javascript:history.go(-1)" />
<input type="button" name="Submit" value="返回" onclick="javascript:history.back()" />
<input type="button" name="Submit" value="返回" onclick="javascript:history.go(-1)" />