<script type="text/javascript">
window.onload=function(){
if (window.history && window.history.pushState) {
window.onpopstate=function(){
window.history.pushState(‘forward‘, null, ‘#‘);
window.history.forward(1);
alert("請先完成註冊,再進行其他操作！")
}
window.history.pushState(‘forward‘, null, ‘#‘);
window.history.forward(1);　
}
}　
</script>

到某個指定的頁面不可以後退