JS操作body

弄个全屏的iframe透明框架然后再在上面搞个层

解决方案 »

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/****************************************
function deleteDiv
div
****************************************/
function deleteDiv(id){
if(document.getElementById(id)){
document.getElementById(id).style.display='none';
document.getElementById(id).innerHTML="";
document.getElementById(id).removeNode();
}
} /****************************************
function lockScreen
div
****************************************/
function lockScreen(divId){
if(document.getElementById(divId)){
deleteDiv(divId);
}else{
var oDiv = document.createElement("DIV");
oDiv.id=divId;
oDiv.style.backgroundColor="#000000";
oDiv.style.position ="absolute";
oDiv.style.top = 0;
oDiv.style.left = 0;
oDiv.style.width=document.body.clientWidth+ "px";
oDiv.style.height=document.body.clientHeight+ "px";//filter:alpha(Opacity=20)
oDiv.style.filter="alpha(Opacity=20)";
//oDiv.style.z-index="1";
document.body.appendChild(oDiv);
}
} 两个配合着用，
你的“新打开的层”要设置一个z-index保证在最上面，
给定一个div id的值调用演示：
var lockDivId="forlockscreenohahaha";
lockScreen(lockDivId); 用完后，调用：
deleteDiv(lockDivId);
删除
如有不合适的地方，就改改吧，祝你成功
创建一下和浏览器工作区域一样大的层，
把事个画面盖住，然后在上面再创建显示信息用的浮层。找了个例子给你。<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>greencss.com</title>
<script type="text/javascript">
function sAlert(str,stitle){
var msgw,msgh,bordercolor;
msgw=300;//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=2,opacity=25,finishOpacity=75";
bgObj.style.opacity="0.6";
bgObj.style.left="0";
bgObj.style.width=sWidth + "px";
bgObj.style.height=sHeight*2 + "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 = "20%";
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titlevar 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="<a href=http://www.myziy.com><img border=0 src="+str+"></img></a>";//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>
</head><body>
<p onclick="sAlert('logo.png','登录');">登陆</p>
<br>
<input type="text" value="test">
</body>
</html>
透明层var overlay=document.createElement("div");
            overlay.id="overlay";
            overlay.onclick=hideOverlay;
            document.body.appendChild(overlay);function showOverlay(){
        var over=document.getElementById("overlay");
        over.style.height=windowHeight()+"px";
        over.style.width=windowWidth()+"px";
        fadeIn(over,10,1);
        }
function windowHeight(){//浏览器视口的宽高
var de = document.documentElement;
return self.innertHeight || (de && de.clientHeight)||
document.body.clientHeight;
}function windowWidth(){
var de = document.documentElement;
return self.innertWidth|| (de && de.clientWidth)||
document.body.clientWidth;
}
function fadeIn(elem,max,dep){//元素透明度渐现
setOpacity(elem,0);
show(elem);
for(var i=0;i<=max;i+=dep){
(
function(){
var pos=i;
setTimeout(function(){
setOpacity(elem,pos);
},(pos+1)*10);
}
)();
}
}给个按钮触发showOverlay（）透明层就出现了
jQuery plug-in blockUI
or
thickbox