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<td height=20 class="p1" bgcolor="#E8E8E8" align="left"><img src="/pc/img/blank.gif" width="12" height="8"><font color="#000000"><font color="#FF9966">当前位置</font>：<a href="/default.htm" class="under">洪恩在线</a>
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<td width="115" align="center" class="p2"><b><font color="#FFFFFF">CSS特效赏析</font></b></td>
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<p class="p1" style="line-height:17pt" align="left"> 1.<a href="csstx01.htm">动态改变样式</a><br>
2.<a href="csstx02.htm">动态可视化效果</a><br>
3.<a href="csstx03.htm">动态滤镜显示</a><br>
4.<a href="csstx04.htm">Blentrans属性</a><br>
5.<a href="csstx05.htm">Revealtrans属性</a><br>
6.<a href="csstx06.htm">动态Glow属性</a><br>
7.<a href="csstx07.htm">显示和隐藏</a><br>
8.<a href="csstx08.htm">兼容两种浏览器</a><br>
9.<a href="csstx09.htm">移动对象</a><br>
10.<a href="csstx10.htm">对象的滑动</a><br>
11.<a href="csstx11.htm">键盘控制对象</a><br>
12.<a href="csstx12.htm">鼠标控制对象</a><br>
13.<a href="csstx13.htm">Clip属性的应用</a><br>
14.<a href="csstx14.htm">动态文字变换</a><br>
15.动态改变页面样式<br>
16.动态时钟控制<br>
17.倒计时<br>
18.动态刷新<br>
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<p align="center" class=p1> <a href=/pc/bin/msg.pl?file_id=k_csstx target="_blank"><img src="/pc/img/message.gif" width="64" height="54" alt="请您留言" border="0"><br>
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<p align="center"><b><span class="p3"><br>
<font color="#3366CC">CSS特效赏析</font></span></b></p>
<p align="right" class="p1"> <a href="csstx06.htm">上一实例</a> <a href="csstx08.htm">下一实例</a> </p>
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<p class="p2" style="line-height:17pt"> <font color="#336633"><b>7、显示和隐藏</b></font></p>
<p class="p2" style="line-height:17pt"> 我们来看一下这个例子，点击图片下方的文字使图片显示/隐藏</p>
<script LANGUAGE="JavaScript">
<!--
ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false
function showObject() {
if (ns4) document.blockDiv.visibility = "show"
else blockDiv.style.visibility = "visible"
}
function hideObject() {
if (ns4) document.blockDiv.visibility = "hide"
else blockDiv.style.visibility = "hidden"
}
//-->
</SCRIPT>
<div id="blockDiv" style="visibility:visible;" align="center"> <img src="img/ss05050.jpg" border=0 alt="图片"></div>
<p class="p2" style="line-height:17pt" align="center"><A HREF="javascript:showObject()">显示-
show</A> <A HREF="javascript:hideObject()">隐藏- hide</A>
<p class="p2" style="line-height:17pt"> 我们来看一下这个例子的源代码：
<p class="p2" style="line-height:17pt"> <html> <br>
<head> <br>
<script language="JavaScript"> <br>
<!--<br>
ns4 = (document.layers)? true:false <br>
ie4 = (document.all)? true:false <br>
function init() { <br>
if (ns4) block = document.blockDiv <br>
if (ie4) block = blockDiv.style }<font color="#CC3399">//*设置对象block*//</font>
<br>
function showObject(obj) { <br>
if (ns4) obj.visibility = "show" <br>
else if (ie4) obj.visibility = "visible" } <br>
function hideObject(obj) { <br>
if (ns4) obj.visibility = "hide" <br>
else if (ie4) obj.visibility = "hidden" }<br>
<font color="#CC3399">//*定义两个函数分别用来显示、隐藏对象block*//</font> <br>
//--> </script> </head> <br>
<body onLoad="init()"> <br>
<a href="javascript:showObject(block)">显示-show</A> <br>
<a href="javascript:hideObject(block)">隐蔽-hide</A> <br>
<font color="#CC3399">//*两个超链接调用javascript中的两个函数*//</font> <br>
<div id="blockDiv" style="position:absolute; left:50; top:100;<br>
width:200; visibility:visible;"> <br>
<img src="ss01094.jpg" border=0> </DIV> <font color="#CC3399">//*导入一张图片*//</font>
<br>
</body> <br>
</html>
<p class="p2" style="line-height:17pt"> 我们看到这段代码有一些不同于前面的例子的特点。其实CSS大部分动态的特效都是<br>
DHTML的范畴。<br>
也就是说，它们都是CSS与JavaScript结合起来实现的一种效果。另外，上面这个例<br>
子还涉及到了IE和NS兼容的问题。我们将在下一节针对两种浏览器的兼容问题做详细讲<br>
解。
<p class="p2" style="line-height:17pt"> </p>
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<p class="p1" align="right" width="280" height="185"> <a href="csstx06.htm">上一实例</a> <a href="csstx08.htm">下一实例</a> </p>
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