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javascript实现仿新浪信息提示效果_javascript教程

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以下是引用片段:
<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd“>
<html xmlns=”http://www.w3.org/1999/xhtml” xml:lang=”zh-CN” lang=”zh-CN”>
 <head>
  <meta name=”verify-v1″ content=”P4T6fFCiPVxqMWZ2eztyXVzMHlnwD0wLQOq6LBHN5Y8=” />
  <title>政策文件_中国电力工程造价信息网</title>
  <meta http-equiv=”Content-Type” content=”text/html; charset=gb2312″ />
  <meta http-equiv=”Content-Language” content=”gb2312″ />
  <meta name=”KeyWords” content=”电力工程造价,价格信息,装材,设备,电力工程” />
  <meta name=”description” content=”电力工程造价信息” />
  <style type=”text/css”>
      *{
          margin:0;padding:0;
      }
  </style>
 </head>
 <body>
 
 <div class=”cecmbody” id=”cecmpolicy”>
  <div class=”leftClass”>
  <a href=http://homepage.yesky.com>网页陶吧</a>
  <input type=”button” value=”点击这里” onclick=”sAlert(hello);” />
  </div>
  <div class=”rightClass”>
  </div> 
 </div>
    <script type=”text/javascript” language=”javascript”>
//Author:Daviv
//Blog:http://blog.163.com/jxdawei
//Date:2006-10-27
//Email:jxdawei@gmail.com
   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;
   sHeight=screen.height;
   var bgObj=document.createElement(“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);
   
   var msgObj=document.createElement(“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”);
     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=function(){
          document.body.removeChild(bgObj);
                document.getElementById(“msgDiv”).removeChild(title);
                document.body.removeChild(msgObj);
                }
     document.body.appendChild(msgObj);
     document.getElementById(“msgDiv”).appendChild(title);
     var txt=document.createElement(“p”);
     txt.style.margin=”1em 0″
     txt.setAttribute(“id”,”msgTxt”);
     txt.innerHTML=str;
           document.getElementById(“msgDiv”).appendChild(txt);
            }
  </script>
 </body>
</html>

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