html頭添加代碼
<meta http-equiv="refresh" content="3; url=http://www.baidu.com/" />
js實現
一、最外層top跳轉頁面，適合用於iframe框架集
top.window.location.href("http://www.baidu.com");
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二、window.location.href和window.location.replace的區別
1.window.location.href=“url”：改變url地址；
2.window.location.replace(“url”)：將地址替換成新url，該方法通過指定URL替換當前緩存在歷史里（客戶端）的項目，
因此當使用replace方法之后，你不能通過“前進”和“后 退”來訪問已經被替換的URL，這個特點對於做一些過渡頁面非常有用！
三、強制頁面刷新
1.window.location.reload()：強制刷新頁面，從服務器重新請求！
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四、window.location.reload();
頁面實現跳轉和刷新:
1 history.go(0)
2 location.reload()
3 location=location
4 location.assign(location)
5 document.execCommand('Refresh')
6 window.navigate(location)
7 location.replace(location)
8 document.URL=location.href
這幾個都可以刷新:
window.location.reload();刷新
window.location.href=window.location.href;刷新
window.close();關閉窗口，不彈出系統提示，直接關閉
window.close()相當於self屬性是當前窗口
window.parent.close()是parent屬性是當前窗口或框架的框架組
頁面實現跳轉的九種方法實例：
1 setTimeout('window.navigate("top.html");',2000); 2 setTimeout('window.document.location.href="top.html";',2000); 3 setTimeout('window.document.location="top.html";',2000); 4 setTimeout('window.location.href="top.html";',2000); 5 setTimeout('window.location="top.html";',2000); 6 setTimeout('document.location.href="top.html";',2000); 7 setTimeout('document.location="top.html";',2000); 8 setTimeout('location.href="top.html";',2000); 9 setTimeout('location.replace("top.html")',2000);
//window對象
//document對象
//location對象
//href屬性
//1.window.document.location.href
//2.window.document.location
//3.window.location.href
//4.window.location
//5.document.location.href
//6.document.location
//7.location.href
//8.window.navigate
//9.location.replace
只要使用location方法，和任意的window對象，location對象，href屬性連用，都可以頁面的跳轉
解釋：
location是個對象，比如本頁的document.location和window.location的屬性有
location.hostname = community.csdn.net
location.href = http://community.csdn.net/Expert/topic/4033/4033372.xml?temp=2.695864E-02
location.host = community.csdn.net
location.hash =
location.port =
location.pathname = /Expert/topic/4033/4033372.xml
location.search = ?temp=2.695864E-02
location.protocol = http:
可見href是location的屬性，類別是string。