js 获取HTML 中的 title和 alt中的数据显示层，title数据显示

js 获取HTML 中的 title和 alt中的数据显示层，title数据显示

----------------------------------------------获取HTML 中的 title和 alt中的数据-------------------------------
<SCRIPT language=JavaScript>

var pltsPop=null;
var pltsoffsetX = 10;
var pltsoffsetY = 15;
var pltsPopbg="#ffffee";
var pltsPopfg="#111111";
var pltsTitle="";
document.write('<div id=pltsTipLayer ></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="";
  else{
    re=//{(.[^/{]*)/}(.*)/ig;
   pltsTitle=Msg.replace(re,"$1")+"&nbsp;";
    re=//{(.[^/{]*)/}/ig;
    Msg=Msg.replace(re,"");
    Msg=Msg.replace("<br>","");}
    var attr=(document.location.toString().toLowerCase().indexOf("list.asp")>0?"nowrap":"");
      var content =
     '<table id=toolTipTalbe border=0><tr><td width="100%"><table class=selet_bg cellspacing="0" cellpadding="0" >'+
     '<tr id=pltsPoptop><th height=12 valign=bottom class=header><p id=topleft align=left>'+pltsTitle+'</p><p id=topright align=right >'+pltsTitle+'?§J</font></th></tr>'+
     '<tr><td "+attr+" class=f_one >'+Msg+'</td></tr>'+
     '<tr id=pltsPopbot ><th height=12 valign=bottom class=header><p id=botleft align=left>'+pltsTitle+'</p><p id=botright align=right >'+pltsTitle+'</font></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>