Javascript 页面向前/向后导航代码

利用浏览器的缓存实现类似于浏览器的向前向后功能

<input id="btnBack" type="button" value="Back" language="javascript" onclick="fnBack()" />
<input id="btnForward" type="button" value="Forward" language="javascript" onclick="fnForward()"
function fnBack()
{
    history.go(-1); //GOES BACK BY ONE PAGE
} 
function fnForward()
{
    history.go(1); //GOES FORWARD BY ONE PAGE
}