用层模拟,刚刚写的,自己再强化
<body>
<script>
function show(o){
tip.style.posLeft=event.clientX+document.body.scrollLeft+10
tip.style.posTop=event.clientY+document.body.scrollTop+10;
tip.style.visibility=''
tip.innerHTML=o.alt;
}
function hid(){
tip.style.visibility='hidden'
}
</script>
<DIV id=tip style="visibility:hidden;position:absolute;width:80px;height:20;border:1 solid #3366cc;background-color:#d2e8ff">
</DIV>
<a href="fason.net" alt="http://fason.nease.net" onmousemove="show(this)" onmouseout="hid()">fason fason..</a>
</body>
<body>
<script>
function show(o){
tip.style.posLeft=event.clientX+document.body.scrollLeft+10
tip.style.posTop=event.clientY+document.body.scrollTop+10;
tip.style.visibility=''
tip.innerHTML=o.alt;
}
function hid(){
tip.style.visibility='hidden'
}
</script>
<DIV id=tip style="visibility:hidden;position:absolute;width:80px;height:20;border:1 solid #3366cc;background-color:#d2e8ff">
</DIV>
<a href="fason.net" alt="http://fason.nease.net" onmousemove="show(this)" onmouseout="hid()">fason fason..</a>
</body>
试试这样
<img src="top.jpg" width=500 height=550 title="    fason    ">
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="<center><font color="+eval("\"#"+color3+"\"")+">"+myString+"</font></center>";
var hx=event.offsetX;
var vy=event.offsetY;
var kuan=100;
var gao=eval(4*6*8*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，
<head>
<script Language="JavaScript">
//***********默认设置定义.*********************
tPopWait=50;//停留tWait豪秒后显示提示。
tPopShow=5000;//显示tShow豪秒后关闭提示
showPopStep=20;
popOpacity=99;//***************内部变量定义*****************
sPop=null;
curShow=null;
tFadeOut=null;
tFadeIn=null;
tFadeWaiting=null;document.write("<style type='text/css'id='defaultPopStyle'>");
document.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)}");
document.write("</style>");
document.write("<div id='dypopLayer' style='position:absolute;z-index:1000;' class='cPopText'></div>");
function showPopupText(){
var o=event.srcElement;
MouseX=event.x;
MouseY=event.y;
if(o.alt!=null && o.alt!=""){o.dypop=o.alt;o.alt=""};
if(o.title!=null && o.title!=""){o.dypop=o.title;o.title=""};
if(o.dypop!=sPop) {
sPop=o.dypop;
clearTimeout(curShow);
clearTimeout(tFadeOut);
clearTimeout(tFadeIn);
clearTimeout(tFadeWaiting);
if(sPop==null || sPop=="") {
dypopLayer.innerHTML="";
dypopLayer.style.filter="Alpha()";
dypopLayer.filters.Alpha.opacity=0;
}
else {
if(o.dyclass!=null) popStyle=o.dyclass
else popStyle="cPopText";
curShow=setTimeout("showIt()",tPopWait);
}
}
}function showIt(){
dypopLayer.className=popStyle;
dypopLayer.innerHTML=sPop;
popWidth=dypopLayer.clientWidth;
popHeight=dypopLayer.clientHeight;
if(MouseX+12+popWidth>document.body.clientWidth) popLeftAdjust=-popWidth-24
else popLeftAdjust=0;
if(MouseY+12+popHeight>document.body.clientHeight) popTopAdjust=-popHeight-24
else popTopAdjust=0;
dypopLayer.style.left=MouseX+12+document.body.scrollLeft+popLeftAdjust;
dypopLayer.style.top=MouseY+12+document.body.scrollTop+popTopAdjust;
dypopLayer.style.filter="Alpha(Opacity=0)";
fadeOut();
}function fadeOut(){
if(dypopLayer.filters.Alpha.opacity<popOpacity) {
dypopLayer.filters.Alpha.opacity+=showPopStep;
tFadeOut=setTimeout("fadeOut()",1);
}
else {
dypopLayer.filters.Alpha.opacity=popOpacity;
tFadeWaiting=setTimeout("fadeIn()",tPopShow);
}
}function fadeIn(){
if(dypopLayer.filters.Alpha.opacity>0) {
dypopLayer.filters.Alpha.opacity-=1;
tFadeIn=setTimeout("fadeIn()",1);
}
}
document.onmouseover=showPopupText;
</script>
</head>
<BODY>
<a href="dispbbs.asp" title="我想请问斑竹？<br>作者：农民<br>发表于2002-6-3 20:17:16<br>最后跟贴：呵呵，是住我们......">我想请问斑竹？</a>接着前面的
</body>
</html>