// JavaScript Document
function   sAlert(str)
{ 
    var   msgw,msgh,bordercolor; 
    msgw=400;//提示窗口的宽度 
    msgh=200;//提示窗口的高度 
    titleheight=0   //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=document.body.clientHeight;//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 "   ; 
    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" ; 
    title.style.height= "18px "; 
    title.style.font= "12px   Verdana,   Geneva,   Arial,   Helvetica,   sans-serif"; 
    title.style.color= "white"; 
    title.style.cursor= "pointer"; 
    title.innerHTML= "關閉"; 
    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"; 
//    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 
}