title属性实现换行,在firefox中不行,好像得写一个js的title类如何做啊

<style>
.tableBorder7{width:800;solid; background-color: #000000;}
TD{font-family: 宋体;font-size: 12px;line-height : 15px ;}
th{background-color: #f7f7f7;color: #000000;font-size: 12px;font-weight:bold;}
th.th1{background-color: #333333;}
td.TableBody7{background-color: #B1EA45;}
</style>
<script language="JavaScript">
//more javascript from http://www.webjx.com
<!--
var pltsPop=null;
var pltsoffsetX = 10;   // 弹出窗口位于鼠标左侧或者右侧的距离；3-12 合适
var pltsoffsetY = 15;  // 弹出窗口位于鼠标下方的距离；3-12 合适
var pltsPopbg="#FFFFEE"; //背景色
var pltsPopfg="#111111"; //前景色
var pltsTitle="";
document.write('<div id=pltsTipLayer style="display: none;position: absolute; z-index:10001"></div>');
function pltsinits()
{
    document.onmouseover   = plts;
    document.onmousemove = moveToMouseLoc;
}
function plts()
{  var o=event.srcElement;
    if(o.alt!=null && o.alt!=""){o.dypop=o.alt;o.alt=""};
    if(o.title!=null && o.title!=""){o.dypop=o.title;o.title=""};
    pltsPop=o.dypop;
    if(pltsPop!=null&&pltsPop!=""&&typeof(pltsPop)!="undefined")
    {
       pltsTipLayer.style.left=-1000;
       pltsTipLayer.style.display='';
       var Msg=pltsPop.replace(/\n/g,"<br>");
       Msg=Msg.replace(/\0x13/g,"<br>");
       var re=/\{(.[^\{]*)\}/ig;
       if(!re.test(Msg))pltsTitle="<font color=#ffffff>简介</font>";
       else{
         re=/\{(.[^\{]*)\}(.*)/ig;
           pltsTitle=Msg.replace(re,"$1")+" ";
         re=/\{(.[^\{]*)\}/ig;
         Msg=Msg.replace(re,"");
         Msg=Msg.replace("<br>","");}
         //var attr=(document.location.toString().toLowerCase().indexOf("list.asp")>0?"nowrap":"");
              var content =
             '<table style="FILTER:alpha(opacity=90) shadow(color=#bbbbbb,direction=135);" id=toolTipTalbe border=0><tr><td width="100%"><table class=tableBorder7 cellspacing="1" cellpadding="0" style="width:100%">'+
             '<tr id=pltsPoptop ><th height=18 valign=bottom class=th1 ><b><p id=topleft align=left><font color=#ffffff>↖</font>'+pltsTitle+'</p><p id=topright align=right style="display:none">'+pltsTitle+'<font color=#ffffff>↗</font></b></th></tr>'+
             '<tr><td "+attr+" class=tablebody7 style="padding-left:14px;padding-right:14px;padding-top: 6px;padding-bottom:6px;line-height:135%">'+Msg+'</td></tr>'+
             '<tr id=pltsPopbot style="display:none"><th height=18 valign=bottom class=th1><b><p id=botleft align=left><font color=#ffffff>↙</font>'+pltsTitle+'</p><p id=botright align=right style="display:none">'+pltsTitle+'<font color=#ffffff>↘</font></b></th></tr>'+
             '</table></td></tr></table>';
              pltsTipLayer.innerHTML=content;
              toolTipTalbe.style.width=Math.min(pltsTipLayer.clientWidth,document.body.clientWidth/2.2);
              moveToMouseLoc();
              return true;
       }
    else
    {
           pltsTipLayer.innerHTML='';
             pltsTipLayer.style.display='none';
              return true;
    }
}
function moveToMouseLoc()
{
       if(pltsTipLayer.innerHTML=='')return true;
       var MouseX=event.x;
       var MouseY=event.y;
       //window.status=event.y;
       var popHeight=pltsTipLayer.clientHeight;
       var popWidth=pltsTipLayer.clientWidth;
       if(MouseY+pltsoffsetY+popHeight>document.body.clientHeight)
       {
                popTopAdjust=-popHeight-pltsoffsetY*1.5;
                pltsPoptop.style.display="none";
                pltsPopbot.style.display="";
       }
        else
       {
                 popTopAdjust=0;
                pltsPoptop.style.display="";
                pltsPopbot.style.display="none";
       }
       if(MouseX+pltsoffsetX+popWidth>document.body.clientWidth)
       {
              popLeftAdjust=-popWidth-pltsoffsetX*2;
              topleft.style.display="none";
              botleft.style.display="none";
              topright.style.display="";
              botright.style.display="";
       }
       else
       {
              popLeftAdjust=0;
              topleft.style.display="";
              botleft.style.display="";
              topright.style.display="none";
              botright.style.display="none";
       }
       pltsTipLayer.style.left=MouseX+pltsoffsetX+document.body.scrollLeft+popLeftAdjust;
       pltsTipLayer.style.top=MouseY+pltsoffsetY+document.body.scrollTop+popTopAdjust;
         return true;
}
pltsinits();
//-->
</script>
</HEAD>
<BODY>
<div title="醉别西楼醒不记，春梦秋云，聚散真容易。<br>斜月半窗还少睡。画屏闲展吴山翠。<br>衣上酒痕诗里字，点点行行，总是凄凉意。<br>红烛自怜无好计，夜寒空替人垂泪。">指导这里来网页教学网</div>
</BODY>
</HTML>