网页下拉菜单被遮住的解决方法
http://bbs.soshow.org/viewthread.php?tid=29143
1.被Flash挡住
设置Flash的参数:<param name=”wmode” value=”opaque”>,设置为透明模式
-
- <object classid=”clsid:D27CDB6E-AE6D-11cf-96B8-444553540000″ codebase=”http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0″ width=”468″ height=”60″><param name=”movie” value=”http://pepsi.flash8.net/pepsi46860.swf”>
- <param name=”wmode” value=”opaque”><param name=”quality” value=”high”><embed src=”http://pepsi.flash8.net/pepsi46860.swf” quality=”high” pluginspage=”http://www.macromedia.com/go/getflashplayer” type=”application/x-shockwave-flash” width=”468″ height=”60″></embed></object>
- <div style=”position:absolute;left:150;top:50;width:100px;height:50px;background:green”>
- </div>
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或者用<param name=”wmode” value=”transparent”>
- <object classid=”clsid:D27CDB6E-AE6D-11cf-96B8-444553540000″ codebase=”http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0″ width=”468″ height=”60″><param name=”movie” value=”http://pepsi.flash8.net/pepsi46860.swf”>
- <param name=”wmode” value=”transparent”><param name=”quality” value=”high”><embed src=”http://pepsi.flash8.net/pepsi46860.swf” quality=”high” pluginspage=”http://www.macromedia.com/go/getflashplayer” type=”application/x-shockwave-flash” width=”468″ height=”60″></embed></object>
- <div style=”position:absolute;left:150;top:50;width:100px;height:50px;background:green”>
- </div>
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2.被图片挡住
这个估计是因为图片也放在层中,而图片所在层的Z轴索引值比该层大,所以被挡住,解决办法是更改该层的Z轴索引值至比图片层大。
- <div style=”position:absolute;left:0;top:20;z-index:2;background:red;width:120px;height:70px”>
- 1<img src=”http://www.flash8.net/images/logo.gif”>
- </div>
- <div style=”position:absolute;left:50;top:50;z-index:2;background:green;width:120px;height:70px”>
- 2<img src=”http://www.flash8.net/images/logo.gif”>
- </div>
- <div style=”position:absolute;left:90;top:80;z-index:2;background:blue;width:120px;height:70px”>
- 3<img src=”http://www.flash8.net/images/logo.gif”>
- </div>
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3.被表单控件挡住
这个目前还没有完美的解决方法,一般都是在设计排版时就尽量避免这种情况,如果是万不得已,就在层经过表单控件时让表单控件隐藏,过后再让它显示:
- <button onClick=”oSelect.style.display=’none’;oLayer.style.display=’inline’”>显示层隐藏下拉选项</button><button onClick=”oSelect.style.display=’inline’;oLayer.style.display=’none’”>显示下拉选项隐藏层</button>
- <div style=”position:absolute;left:0;top:50;z-index:2;background:red;width:120px;height:50px”>
- z-index:1<select id=”oSelect”></select>
- </div>
- <div id=”oLayer” style=”position:absolute;left:30;top:60;z-index:2;background:green;width:120px;height:70px;display:none”>
- z-index:2<img src=”http://www.flash8.net/images/logo.gif”>
- </div>
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当然还有用优先级别较高的控件来代替层的方法解决,但控件并非是每台机器上都有安装,而且控件的可定制性也差,也就是常说的兼容性问题:
hhctrl.ocx
- <OBJECT id=hhctrl type=”application/x-oleobject” classid=”clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11″ codebase=”<I>file:</I>hhctrl.ocx#Version=4,0,0,24″ width=80 height=20>
- <PARAM name=”Command” value=”Related Topics, MENU”>
- <PARAM name=”Button” value=”Menu”>
- <PARAM name=”Item1″ value=”[闲闪互动];http://www.soshow.org/”>
- <PARAM name=”Item2″ value=”闪客之吧;http://www.flash8.net”>
- <PARAM name=”Item3″ value=”閑闪论坛;http://bbs.soshow.org/”>
- <PARAM name=”Item4″ value=”蓝色理想;http://www.blueidea.com/”>
- <PARAM name=”Item5″ value=”<a href=”http://www.5d.cn”>5D多媒体</a>;http://www.5d.cn”>
- </OBJECT>
- <select></select>
- window.createPopup()窗口(需要IE5.5+支持)
- <SCRIPT>
- var oPopup = window.createPopup();
- function showPopupWin(){
- var oPopBody = oPopup.document.body;
- oPopBody.style.backgroundColor = “green”;
- oPopup.show(50, 120, 180, 65,document.body);
- }
- </SCRIPT>
- <BUTTON onclick=”showPopupWin()”>Click Me!</BUTTON><select></select>
- <iframe src=”index.asp” mce_src=”index.asp”></iframe>
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