如何控制 title 属性出现提示的大小?

谢！
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用层模拟,刚刚写的,自己再强化

 1<body>
 2<script>   
 3function show(o){   
 4tip.style.posLeft=event.clientX+document.body.scrollLeft+10   
 5tip.style.posTop=event.clientY+document.body.scrollTop+10;   
 6tip.style.visibility=''   
 7tip.innerHTML=o.alt;   
 8}   
 9function hid(){   
10tip.style.visibility='hidden'   
11}   
12</script>
13<div id="tip" style="visibility:hidden;position:absolute;width:80px;height:20;border:1 solid #3366cc;background-color:#d2e8ff">
14</div>
15<a alt="http://fason.nease.net" href="fason.net" onmousemove="show(this)" onmouseout="hid()">fason fason..</a>
16</body>

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除非改系统属性，不过那样所有的title都变大了。
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用这个最好的
popup

var myPopup=window.createPopup();
function myShowHelp(myString,color1,color2,color3){
var popupBody=myPopup.document.body;
popupBody.style.backgroundColor=eval(""#"+color1+""");
popupBody.style.border="solid " +eval(""#"+color2+""")+ " 1px";
popupBody.innerHTML="

1<center><font \"#"+color3+"\"")+"="" color="+eval(">"+myString+"</font></center>

";
var hx=event.offsetX;
var vy=event.offsetY;
var kuan=100;
var gao=eval(468*myString.length/kuan);
gao=Math.ceil(gao);
if(gao<14){gao=14;}
if(gao%14!=0)gao=gao-gao%14+14;
myPopup.show(hx-20,vy+16,kuan,gao,document.body);

}

function myCloseHelp(){
myPopup.hide();
}

再需要的时候，调用上面的函数，
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 1<html>
 2<head>
 3<script language="JavaScript">   
 4//***********默认设置定义.*********************   
 5tPopWait=50;//停留tWait豪秒后显示提示。   
 6tPopShow=5000;//显示tShow豪秒后关闭提示   
 7showPopStep=20;   
 8popOpacity=99;   
 9  
10//***************内部变量定义*****************   
11sPop=null;   
12curShow=null;   
13tFadeOut=null;   
14tFadeIn=null;   
15tFadeWaiting=null;   
16  
17document.write("<style type='text/css'id='defaultPopStyle'>");   
18document.write(".cPopText { background-color: #F8F8F5;color:#000000; border: 1px #000000 solid;font-color: font-size: 12px; padding-right: 4px; padding-left: 4px; height: 20px; padding-top: 2px; padding-bottom: 2px; filter: Alpha(Opacity=0)}");   
19document.write("</style>");   
20document.write("<div id='dypopLayer' style='position:absolute;z-index:1000;' class='cPopText'></div>");   
21  
22  
23function showPopupText(){   
24var o=event.srcElement;   
25MouseX=event.x;   
26MouseY=event.y;   
27if(o.alt!=null && o.alt!=""){o.dypop=o.alt;o.alt=""};   
28if(o.title!=null && o.title!=""){o.dypop=o.title;o.title=""};   
29if(o.dypop!=sPop) {   
30sPop=o.dypop;   
31clearTimeout(curShow);   
32clearTimeout(tFadeOut);   
33clearTimeout(tFadeIn);   
34clearTimeout(tFadeWaiting);   
35if(sPop==null ¦ ¦ sPop=="") {   
36dypopLayer.innerHTML="";   
37dypopLayer.style.filter="Alpha()";   
38dypopLayer.filters.Alpha.opacity=0;   
39}   
40else {   
41if(o.dyclass!=null) popStyle=o.dyclass   
42else popStyle="cPopText";   
43curShow=setTimeout("showIt()",tPopWait);   
44}   
45  
46}   
47}   
48  
49function showIt(){   
50dypopLayer.className=popStyle;   
51dypopLayer.innerHTML=sPop;   
52popWidth=dypopLayer.clientWidth;   
53popHeight=dypopLayer.clientHeight;   
54if(MouseX+12+popWidth>document.body.clientWidth) popLeftAdjust=-popWidth-24   
55else popLeftAdjust=0;   
56if(MouseY+12+popHeight>document.body.clientHeight) popTopAdjust=-popHeight-24   
57else popTopAdjust=0;   
58dypopLayer.style.left=MouseX+12+document.body.scrollLeft+popLeftAdjust;   
59dypopLayer.style.top=MouseY+12+document.body.scrollTop+popTopAdjust;   
60dypopLayer.style.filter="Alpha(Opacity=0)";   
61fadeOut();   
62}   
63  
64function fadeOut(){   
65if(dypopLayer.filters.Alpha.opacity<popOpacity) {   
66dypopLayer.filters.Alpha.opacity+=showPopStep;   
67tFadeOut=setTimeout("fadeOut()",1);   
68}   
69else {   
70dypopLayer.filters.Alpha.opacity=popOpacity;   
71tFadeWaiting=setTimeout("fadeIn()",tPopShow);   
72}   
73}   
74  
75function fadeIn(){   
76if(dypopLayer.filters.Alpha.opacity>0) {   
77dypopLayer.filters.Alpha.opacity-=1;   
78tFadeIn=setTimeout("fadeIn()",1);   
79}   
80}   
81document.onmouseover=showPopupText;   
82</script>
83</head>
84<body>
85<a href="dispbbs.asp" title="我想请问斑竹？&lt;br&gt;作者：农民&lt;br&gt;发表于2002-6-3 20:17:16&lt;br&gt;最后跟贴：呵呵，是住我们......">我想请问斑竹？</a>   
86  
87接着前面的   
88</body>
89</html>