<!--為什么這里的function無法獲取全局變量的值？為什么全局變量不起作用？-->
????<script?type="text/javascript">
????var?btn?=?document.getElementById('strHref'),
????????hpn?=?document.getElementById('hpn');
????
????function?showdiv()?{//展開函數(shù)???
????????hpn.style.display?=?'block';
????????btn.innerHTML?=?'收起';
????????btn.href?=?"javascript:hidediv();";
????}
????function?hidediv()?{//收起函數(shù)
????????hpn.style.display?=?'none';
????????btn.innerHTML?=?'展開';
????????btn.href?=?"javascript:showdiv();";
????}
????</script>

從html調(diào)用函數(shù)，頁面不能動態(tài)顯示。

<script?type="text/javascript">
????????function?showdiv()?{//展開函數(shù)
????????var?btn?=?document.getElementById('strHref'),
????????????hpn?=?document.getElementById('hpn');
????????????hpn.style.display?=?'block';
????????????btn.innerHTML?=?'收起';
????????????btn.href?=?"javascript:hidediv();";
????????}
????????function?hidediv()?{//收起函數(shù)
????????var?btn?=?document.getElementById('strHref'),
????????????hpn?=?document.getElementById('hpn');
????????????hpn.style.display?=?'none';
????????????btn.innerHTML?=?'展開';
????????????btn.href?=?"javascript:showdiv();";
????????}
????</script>

改成上面這樣的就沒有問題了。

為什么function無法獲取全局變量的值？

為什么全局變量不起作用？

求解，謝謝:-D