<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>測試</p><p>測試</p><p>測試</p><p>測試</p><p>測試</p><p>測試</p><p>測試</p>
<p>測試</p><p>測試</p><p>測試</p><p>測試</p><p>測試</p><p>測試</p><p>測試</p><p>測試</p>
<input type="button" value="點擊這里" onclick="sAlert('測試效果<br/>嗯！效果還不錯！');" />
<script type="text/javascript" language="javascript">
function sAlert(str){
var msgw,msgh,bordercolor;
msgw=400;//提示窗口的寬度
msgh=100;//提示窗口的高度
titleheight=25 //提示窗口標題高度
bordercolor="#336699";//提示窗口的邊框顏色
titlecolor="#99CCFF";//提示窗口的標題顏色
var sWidth,sHeight;
sWidth=document.body.offsetWidth;//瀏覽器工作區域內頁面寬度
sHeight=screen.height;//屏幕高度（垂直分辨率）
//背景層（大小與窗口有效區域相同，即當彈出對話框時，背景顯示為放射狀透明灰色）
var bgObj=document.createElement("div");//創建一個div對象（背景層）
//定義div屬性，即相當於
//<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內添加該div對象
var msgObj=document.createElement("div")//創建一個div對象（提示框層）
//定義div屬性，即相當於
//<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");//創建一個h4對象（提示框標題欄）
//定義h4的屬性，即相當於
//<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="">關閉</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="關閉";
title.onclick=removeObj;
var button=document.createElement("input");//創建一個input對象（提示框按鈕）
//定義input的屬性，即相當於
//<input type="button" align="center" style="width:100px; align:center; margin-left:250px; margin-bottom:10px;" value="關閉">
button.setAttribute("type","button");
button.setAttribute("value","關閉");
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(){//點擊標題欄觸發的事件
document.body.removeChild(bgObj);//刪除背景層Div
document.getElementById("msgDiv").removeChild(title);//刪除提示框的標題欄
document.body.removeChild(msgObj);//刪除提示框層
}
document.body.appendChild(msgObj);//在body內添加提示框div對象msgObj
document.getElementById("msgDiv").appendChild(title);//在提示框div中添加標題欄對象title
var txt=document.createElement("p");//創建一個p對象（提示框提示信息）
//定義p的屬性，即相當於
//<p style="margin:1em 0;" id="msgTxt">測試效果</p>
txt.style.margin="1em 0"
txt.setAttribute("id","msgTxt");
txt.innerHTML=str;//來源於函數調用時的參數值
document.getElementById("msgDiv").appendChild(txt);//在提示框div中添加提示信息對象txt
document.getElementById("msgDiv").appendChild(button);//在提示框div中添加按鈕對象button
}
</script>
</body>
</html>
