改善用户体验的alert提示效果

    现在，当弹出千篇一律的Alert警告框被这样的一种方式取代时，给人的感觉是相当的新鲜的。
这样<input type="button" value="点击这里" onclick="sAlert(’测试效果<br>还可以直接书写HTML代码 <br>© 2006’);" />
<script type="text/javascript" language="javascript">
//Author:Daviv
//Blog:http://blog.163.com/jxdawei
//Date:2006-10-28
//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
        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=document.body.offsetHeight;

        var bgObj=document.createElement("div");
        bgObj.setAttribute(’id’,’bgDiv’);
        bgObj.style.position="absolute";
        bgObj.style.top="0";
        bgObj.style.background="#777";
        bgObj.style.filter="progidXImageTransform.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";
        document.body.appendChild(bgObj);
        var msgObj=document.createElement("div")
        msgObj.setAttribute("id","msgDiv");
        msgObj.setAttribute("align","center");
        msgObj.style.position="absolute";
        msgObj.style.background="white";
        msgObj.style.font="12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";
        msgObj.style.border="1px solid " + bordercolor;
        msgObj.style.width=msgw + "px";
        msgObj.style.height=msgh + "px";
        msgObj.style.top=(document.documentElement.scrollTop + (sHeight-msgh)/2) + "px";
        msgObj.style.left=(sWidth-msgw)/2 + "px";
        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;
    doc
    把SCRIPT做成一个JS文件就可以了

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