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弹出层并锁定页面

<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="http://www.mamicode.com/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="http://www.mamicode.com/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>

 

弹出层并锁定页面