用JS弹出网页对话框后，如何让后面那一层变灰。 - Web 开发 / Ajax
如题，我想用JS弹出网页对话框后，后面那一怪变灰，变成不可操做。
[解决办法]
<html>
<head>
<title> </title>
<meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 " />
<style type= "text/css ">
*{margin:0;padding:0;}
</style>
</head>
<body>
<p> 测试 </p> <p> 测试 </p> <p> 测试 </p> <p> 测试 </p> <p> 测试 </p> <p> 测试 </p> <p> 测试 </p>
<p> 测试 </p> <p> 测试 </p> <p> 测试 </p> <p> 测试 </p> <p> 测试 </p> <p> 测试 </p> <p> 测试 </p> <p> 测试 </p>
<input type= "button " value= "点击这里 " onclick= "sAlert( '测试效果 <br/> 嗯！效果还不错！ '); " />
<script type= "text/javascript " language= "javascript ">
function sAlert(str){
var msgw,msgh,bordercolor;
msgw=400;//提示窗口的宽度
msgh=100;//提示窗口的高度
titleheight=25 //提示窗口标题高度
bordercolor= "#336699 ";//提示窗口的边框颜色
titlecolor= "#99CCFF ";//提示窗口的标题颜色
var sWidth,sHeight;
sWidth=document.body.offsetWidth;//浏览器工作区域内页面宽度
sHeight=screen.height;//屏幕高度（垂直分辨率）
//背景层（大小与窗口有效区域相同，即当弹出对话框时，背景显示为放射状透明灰色）
var bgObj=document.createElement( "div ");//创建一个div对象（背景层）
//定义div属性，即相当于
// <div id= "bgDiv " style= "position:absolute; top:0; background-color:#777; filter:progid:DXImagesTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75); opacity:0.6; left:0; width:918px; height:768px; z-index:10000; "> </div>
bgObj.setAttribute( 'id ', 'bgDiv ');
bgObj.style.position= "absolute ";
bgObj.style.top= "0 ";
bgObj.style.background= "#777 ";
bgObj.style.filter= "progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75 ";
bgObj.style.opacity= "0.6 ";
bgObj.style.left= "0 ";
bgObj.style.width=sWidth + "px ";
bgObj.style.height=sHeight + "px ";
bgObj.style.zIndex = "10000 ";
document.body.appendChild(bgObj);//在body内添加该div对象
var msgObj=document.createElement( "div ")//创建一个div对象（提示框层）
//定义div属性，即相当于
// <div id= "msgDiv " align= "center " style= "background-color:white; border:1px solid #336699; position:absolute; left:50%; top:50%; font:12px/1.6em Verdana,Geneva,Arial,Helvetica,sans-serif; margin-left:-225px; margin-top:npx; width:400px; height:100px; text-align:center; line-height:25px; z-index:100001; "> </div>
msgObj.setAttribute( "id ", "msgDiv ");
msgObj.setAttribute( "align ", "center ");
msgObj.style.background= "white ";
msgObj.style.border= "1px solid " + bordercolor;
msgObj.style.position = "absolute ";
msgObj.style.left = "50% ";
msgObj.style.top = "50% ";
msgObj.style.font= "12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif ";
msgObj.style.marginLeft = "-225px " ;
msgObj.style.marginTop = -75+document.documentElement.scrollTop+ "px ";
msgObj.style.width = msgw + "px ";
msgObj.style.height =msgh + "px ";
msgObj.style.textAlign = "center ";
msgObj.style.lineHeight = "25px ";
msgObj.style.zIndex = "10001 ";
var title=document.createElement( "h4 ");//创建一个h4对象（提示框标题栏）
//定义h4的属性，即相当于
// <h4 id= "msgTitle " align= "right " style= "margin:0; padding:3px; background-color:#336699; filter:progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100); opacity:0.75; border:1px solid #336699; height:18px; font:12px Verdana,Geneva,Arial,Helvetica,sans-serif; color:white; cursor:pointer; " onclick= " "> 关闭 </h4>
title.setAttribute( "id ", "msgTitle ");
title.setAttribute( "align ", "right ");
title.style.margin= "0 ";
title.style.padding= "3px ";
title.style.background=bordercolor;
title.style.filter= "progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100); ";
title.style.opacity= "0.75 ";
title.style.border= "1px solid " + bordercolor;
title.style.height= "18px ";
title.style.font= "12px Verdana, Geneva, Arial, Helvetica, sans-serif ";
title.style.color= "white ";
title.style.cursor= "pointer ";
title.innerHTML= "关闭 ";
title.onclick=removeObj;
var button=document.createElement( "input ");//创建一个input对象（提示框按钮）
//定义input的属性，即相当于
// <input type= "button " align= "center " style= "width:100px; align:center; margin-left:250px; margin-bottom:10px; " value= "关闭 ">
button.setAttribute( "type ", "button ");
button.setAttribute( "value ", "关闭 ");
button.style.width= "60px ";
button.style.align= "center ";
button.style.marginLeft= "250px ";
button.style.marginBottom= "10px ";
button.style.background=bordercolor;
button.style.border= "1px solid "+ bordercolor;
button.style.color= "white ";
button.onclick=removeObj;
function removeObj(){//点击标题栏触发的事件
document.body.removeChild(bgObj);//删除背景层Div
document.getElementById( "msgDiv ").removeChild(title);//删除提示框的标题栏
document.body.removeChild(msgObj);//删除提示框层
}
document.body.appendChild(msgObj);//在body内添加提示框div对象msgObj
document.getElementById( "msgDiv ").appendChild(title);//在提示框div中添加标题栏对象title
var txt=document.createElement( "p ");//创建一个p对象（提示框提示信息）
//定义p的属性，即相当于
// <p style= "margin:1em 0; " id= "msgTxt "> 测试效果 </p>
txt.style.margin= "1em 0 "
txt.setAttribute( "id ", "msgTxt ");
txt.innerHTML=str;//来源于函数调用时的参数值
document.getElementById( "msgDiv ").appendChild(txt);//在提示框div中添加提示信息对象txt
document.getElementById( "msgDiv ").appendChild(button);//在提示框div中添加按钮对象button
}
</script>
</body>
</html>
[解决办法]
就是在整个页面上放二个层
一个是背景层用来遮罩；
一个层用来显示操作页面
用Prototype.js
<script language= "javascript ">
｛
$( 'bgDiv ').style.display = " "; //背景层变灰的层 不可以操作
$( 'ShowDiv ').style.display = " ";//显示层 可以操作的
$w( 'ShowDiv ').each(Element.show);
var url = '你要在新层上打开的页面 ';
var myAjax = new Ajax.Updater(
{success: 'ShowDiv '},url,{method: 'post '});
｝
</script>
------解决方案--------------------
<html>
<head>
<title> Mark </title>
<meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 "/>
<script type= "text/javascript ">
function GetMark()
{
var eif=document.getElementById( 'hideIframe ');
if(eif!=null)
{
document.body.bgColor= 'black ';
eif.style.display= " ";
}
else
{
var e=document.createElement( "iframe ");
e.id= "hideIframe ";
e.scrolling= "no ";
e.frameborder=0;
e.style.position= "absolute ";
e.style.top=0;
e.style.left=0;
e.style.margin=0;
e.style.width= '100% ';
e.style.height= '100% ';
e.style.filter= "Alpha(style=0,opacity=30) ";
document.body.appendChild(e);
e.document.body.bgColor= 'black ';
e.contentWindow.document.write( " <div align= 'center ' style= 'position:absolute;top: "+document.body.clientHeight/2+ ";width:100% '> <font size= '5 '> <b> 正在处理您的请求...... </b> </font> </div> ");
//e.contentWindow.document.body.onclick=HideIf;
}
}
function HideIf()
{
document.getElementById( 'hideIframe ').style.display= "none ";
document.body.bgColor= " ";
}
</script> </head>
<body style= "margin:0px ">
<input type= "button " id= "btn1 " onclick= "GetMark() " value= "获取Mark "/>
<div style= "background-color "
</body>
</html>
