一共分了五个页面，请将以下页面保存，存放于同目录之下，运行查看效果
target_blank -- 在新窗口中打开链接_parent -- 在父窗体中打开链接_self -- 在当前窗体打开链接,此为默认值_top -- 在当前窗体打开链接，并替换当前的整个窗体(框架页)
================================== a.html =======================================
<html><head><title>这是框架页面</title></head><frameset rows="50%,50%"> <frame src="http://pannijingling.blog.163.com/blog/b.html" name='top'><frameset cols="25%,75%"> <frame src="http://pannijingling.blog.163.com/blog/c.html" name='left'> <frame src="http://pannijingling.blog.163.com/blog/d.html" name='rightfram'></frameset></html>
================================== b.html =======================================
<html><head><title>这是b.html页面</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><style type="text/css">a:link { color: #FF0000; text-decoration: none;}a:visited { text-decoration: none; color: #0000FF;}a:hover { text-decoration: underline;}a:active { text-decoration: none;}</style></head><body><center> <a href="http://pannijingling.blog.163.com/blog/e.html" target="rightfram">返回e.html,此种方法只刷新框架的rightfram部分</a> <p><a href="http://pannijingling.blog.163.com/blog/d.html" target="right">返回d.html,此种方法只刷新框架的right部分</a></P> <a href="http://pannijingling.blog.163.com/blog/a.html" target="_parent">返回首页,href设置为框架页，target设置为_parent,此种方法刷新整个框架</a></center></body></html>=============== c.html =============
<html><body> 这是C页面</body></html>
=============== d.html =============
<html><body> 这是D页面</body></html>
=============== e.html =============
<html><body> 这是E页面</body></html>
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