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）

<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} 
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.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>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

<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; 
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function MMove(){ 
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function MUp(){ 
if(Obj!=''){ 
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</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>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

<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>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]