让背景如此暗淡（一种弹出提示信息时页面背景色调改变的方法）

内容摘要

这个效果前些日子有人在论坛问起，今天有空研究了下。我打了原创标记，因为我在写这个方法时的确没有参考过别人的代码。我的方法其实就是层遮罩加ALPHA滤镜实现预期效果。

文章正文

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>提示信息框</title>
<style type="text/css">
a{ color:#000; font-size:12px;text-decoration:none}
a:hover{ color:#900; text-decoration:underline}
body{background:;filter:progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#ffffff,endColorStr=#003366); overflow:hidden}
#massage_box{ position:absolute; left:expression((body.clientWidth-350)/2); top:expression((body.clientHeight-200)/2); width:350px; height:200px;filter:dropshadow(color=#666666,offx=3,offy=3,positive=2); z-index:2; visibility:hidden}
#mask{ position:absolute; top:0; left:0; width:expression(body.clientWidth); height:expression(body.clientHeight); background:#666; filter:ALPHA(opacity=60); z-index:1; visibility:hidden}
.massage{border:#036 solid; border-width:1 1 3 1; width:95%; height:95%; background:#fff; color:#036; font-size:12px; line-height:150%}
.header{background:#036; height:10%; font-family:Verdana, Arial, Helvetica, sans-serif; font-size:12px; padding:3 5 0 5; color:#fff}
</style>
</head><body>
<div id="massage_box"><div class="massage">
<div class="header"><div style="display:inline; width:150px; position:absolute">本站提示信息</div>
<span onClick="massage_box.style.visibility='hidden'; mask.style.visibility='hidden'" style="float:right; display:inline; cursor:hand">×</span></div>
<ul style="margin-right:25"><li>
本人申明此博客所有文章（包括文章插图）均为原创，如需引用或转载请注明出处。
</li><li>欢迎大家对博文中观点留言评述，谢绝无聊人士无素质无观点的灌水漫骂。</li><li>本站已设背景音乐，听音乐盒中收集的音乐时请先到页面底部关闭背景音乐。</li></ul></div></div>
<div id="mask"></div>
<span onClick="mask.style.visibility='visible';massage_box.style.visibility='visible'" style="cursor:hand">显示提示信息</span>
</body>
</html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>提示信息框</title>
<style type="text/css">
a{ color:#000; font-size:12px;text-decoration:none}
a:hover{ color:#900; text-decoration:underline}
body{background:;filter:progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#ffffff,endColorStr=#003366); overflow:hidden}
#massage_box{ position:absolute; left:expression((body.clientWidth-350)/2); top:expression((body.clientHeight-200)/2); width:350px; height:200px;filter:dropshadow(color=#666666,offx=3,offy=3,positive=2); z-index:2; visibility:hidden}
#mask{ position:absolute; top:0; left:0; width:expression(body.clientWidth); height:expression(body.clientHeight); background:#666; filter:ALPHA(opacity=60); z-index:1; visibility:hidden}
.massage{border:#036 solid; border-width:1 1 3 1; width:95%; height:95%; background:#fff; color:#036; font-size:12px; line-height:150%}
.header{background:#036; height:10%; font-family:Verdana, Arial, Helvetica, sans-serif; font-size:12px; padding:3 5 0 5; color:#fff}
</style>

<script language="javascript">
var Obj=''
document.onmouseup=MUp
document.onmousemove=MMove

function MDown(Object){
Obj=Object.id
document.all(Obj).setCapture()
pX=event.x-document.all(Obj).style.pixelLeft;
pY=event.y-document.all(Obj).style.pixelTop;
}

function MMove(){
if(Obj!=''){
document.all(Obj).style.left=event.x-pX;
document.all(Obj).style.top=event.y-pY;
}
}

function MUp(){
if(Obj!=''){
document.all(Obj).releaseCapture();
Obj='';
}
}
</script>
</head><body>
<div id="massage_box"><div class="massage">
<div class="header" onmousedown=MDown(massage_box)><div style="display:inline; width:150px; position:absolute">本站提示信息</div>
<span onClick="massage_box.style.visibility='hidden'; mask.style.visibility='hidden'" style="float:right; display:inline; cursor:hand">×</span></div>
<ul style="margin-right:25"><li>
本人申明此博客所有文章（包括文章插图）均为原创，如需引用或转载请注明出处。
</li><li>欢迎大家对博文中观点留言评述，谢绝无聊人士无素质无观点的灌水漫骂。</li><li>本站已设背景音乐，听音乐盒中收集的音乐时请先到页面底部关闭背景音乐。</li></ul></div></div>
<div id="mask"></div>
<span onClick="mask.style.visibility='visible';massage_box.style.visibility='visible'" style="cursor:hand">显示提示信息</span>
</body>
</html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>提示信息框</title>
<style type="text/css">
a{ color:#000; font-size:12px;text-decoration:none}
a:hover{ color:#900; text-decoration:underline}
body{background:;filter:progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#ffffff,endColorStr=#003366); overflow:hidden}
#massage_box{ position:absolute; left:expression((body.clientWidth-350)/2); top:expression((body.clientHeight-200)/2); width:350px; height:200px;filter:dropshadow(color=#666666,offx=3,offy=3,positive=2); z-index:2; visibility:hidden}
#mask{ position:absolute; top:0; left:0; width:expression(body.scrollWidth); height:expression(body.scrollHeight); background:#666; filter:ALPHA(opacity=60); z-index:1; visibility:hidden}
.massage{border:#036 solid; border-width:1 1 3 1; width:95%; height:95%; background:#fff; color:#036; font-size:12px; line-height:150%}
.header{background:#036; height:10%; font-family:Verdana, Arial, Helvetica, sans-serif; font-size:12px; padding:3 5 0 5; color:#fff}
</style>

<script language="javascript">
var Obj=''
document.onmouseup=MUp
document.onmousemove=MMove

function MDown(Object){
Obj=Object.id
document.all(Obj).setCapture()
pX=event.x-document.all(Obj).style.pixelLeft;
pY=event.y-document.all(Obj).style.pixelTop;
}

function MMove(){
if(Obj!=''){
document.all(Obj).style.left=event.x-pX;
document.all(Obj).style.top=event.y-pY;
}
}

function MUp(){
if(Obj!=''){
document.all(Obj).releaseCapture();
Obj='';
}
}
</script>
</head><body>
<div id="massage_box"><div class="massage">
<div class="header" onmousedown=MDown(massage_box)><div style="display:inline; width:150px; position:absolute">本站提示信息</div>
<span onClick="massage_box.style.visibility='hidden'; mask.style.visibility='hidden'" style="float:right; display:inline; cursor:hand">×</span></div>
<ul style="margin-right:25"><li>
本人申明此博客所有文章（包括文章插图）均为原创，如需引用或转载请注明出处。
</li><li>欢迎大家对博文中观点留言评述，谢绝无聊人士无素质无观点的灌水漫骂。</li><li>本站已设背景音乐，听音乐盒中收集的音乐时请先到页面底部关闭背景音乐。</li></ul></div></div>
<div id="mask"></div>
<span onClick="mask.style.visibility='visible';massage_box.style.visibility='visible'" style="cursor:hand">显示提示信息</span>

bottom here
</body>
</html>

代码注释

[!--zhushi--]

上一篇根本不存在DIV+CSS布局这回事下一篇 C#读取中文字符及清空缓冲区的实现代码

作者：喵哥笔记

学的不仅是技术，更是梦想！