function sAlert(txt,title){
    //var eSrc=(document.all)?window.event.srcElement:arguments[1];
    var shield = document.createElement("IFRAME");
    shield.id = "shield";
    shield.style.position = "absolute";
    shield.style.left = "0px";
    shield.style.top = "0px";
    shield.style.width = "100%";
    shield.style.height = document.body.scrollHeight+"px";
    shield.style.background = "#333";
    shield.style.textAlign = "center";
    shield.style.zIndex = "10000";
    shield.style.filter = "alpha(opacity=0)";
    shield.style.opacity = 0;
    var alertFram = document.createElement("DIV");
    alertFram.id="alertFram";
    alertFram.style.position = "absolute";
    alertFram.style.left = "43%";
    alertFram.style.top = "30%";
    alertFram.style.marginLeft = "-225px" ;
    alertFram.style.marginTop = -75+document.documentElement.scrollTop+"px";
    alertFram.style.width = "600px";
    alertFram.style.height = "350px";
    alertFram.style.background = "#ccc";
    alertFram.style.textAlign = "left";
    alertFram.style.lineHeight = "250px";
    alertFram.style.zIndex = "10001";
    strHtml = "<ul style=\"list-style:none;margin:0px;padding:0px;width:100%\">\n";
    strHtml += "    <li style=\"background:#DD828D;text-align:left;padding-left:10px;font-size:14px;font-weight:bold;height:25px;line-height:25px;border:1px solid #F9CADE;\">[";
    strHtml +=title;
    strHtml +="]</li>\n";
    strHtml +=txt;
    strHtml += "    <li style=\"clear:both;background:#FDEEF4;text-align:center;font-weight:bold;height:25px;line-height:25px; border:1px solid #F9CADE;\"><input type=\"button\" value=\'关　闭\' id=\"do_OK\" onclick=\"doOk()\" /></li>\n";
    strHtml += "</ul>\n";
    alertFram.innerHTML = strHtml;
    document.body.appendChild(alertFram);
    document.body.appendChild(shield);
    this.setOpacity = function(obj,opacity){
        if(opacity>=1)opacity=opacity/100;
        try{ obj.style.opacity=opacity; }catch(e){}
        try{ 
            if(obj.filters.length>0&&obj.filters("alpha")){
                obj.filters("alpha").opacity=opacity*100;
            }else{
                obj.style.filter="alpha(opacity=\""+(opacity*100)+"\")";
            }
        }catch(e){}
    }
    var c = 0;
    this.doAlpha = function(){
        if (++c > 20){clearInterval(ad);return 0;}
        setOpacity(shield,c);
    }
    var ad = setInterval("doAlpha()",1);
    this.doOk = function(){
        //alertFram.style.display = "none";
        //shield.style.display = "none";
        
        document.body.removeChild(alertFram);
        document.body.removeChild(shield);
        //eSrc.focus();
        document.body.onselectstart = function(){return true;}
        document.body.oncontextmenu = function(){return true;}
    }
    document.getElementById("do_OK").focus();
    //eSrc.blur();
    document.body.onselectstart = function(){return false;}
    document.body.oncontextmenu = function(){return false;}
}