用js实现图片链接提示的问题

   我想实现一个图片链接，要求如下：
     1.在鼠标移向图片时会出现提示(如:welcome to ***)，鼠标移出图片时提示不再出现
     2.提示出现在鼠标旁，以文本框形式出现。
  具体如何实现呢？？？知道的朋友帮帮忙哦~~越具体越好哦~~~~！！！！

解决方案 »

免费领取超大流量手机卡，每月29元包185G流量+100分钟通话, 中国电信官方发货

HTML自带支持，用 title 属性：
<img src="xxoo" title="Welcome to XXOO">如果要自己用DIV实现，那么就需要注册事件，在事件调用你自己写的函数来中显示或隐藏某DIV。
<img src="xxoo" onmouseover="showDiv('Welcome to XXOO')" onmouseout="hideDiv()">
用自带的属性就可以了。
<img src="XXX.jpg" alt="welcome to ***">如果要显示自己格式的提示框可以用一楼的，onmouserover事件。
是這種效果嗎?
[html]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>跟随鼠标移动（大图展示）</title>
<style type="text/css">
html,body{overflow:hidden;}
body,div,ul,li{margin:0;padding:0;}
#box ul{width:768px;height:172px;list-style-type:none;margin:10px auto;}
#box li{float:left;width:170px;height:170px;cursor:pointer;display:inline;border:1px solid #ddd;margin:0 10px;}
#box li.active{border:1px solid #a10000;}
#box li img{width:170px;height:170px;vertical-align:top;}
#big{position:absolute;width:400px;height:400px;border:2px solid #ddd;display:none;}
#big div{position:absolute;top:0;left:0;width:400px;height:400px;opacity:0.5;filter:alpha(opacity=50);background:#fff url(http://js.fgm.cc/learn/lesson5/img/loading.gif) 50% 50% no-repeat;}
</style>
<script type="text/javascript">
window.onload = function ()
{
var aLi = document.getElementsByTagName("li");
var oBig = document.getElementById("big");
var oLoading = oBig.getElementsByTagName("div")[0];
var i = 0;

for (i = 0; i < aLi.length; i++)
{
aLi[i].index = i;
//鼠标划过, 预加载图片插入容器并显示
aLi[i].onmouseover = function ()
{
var oImg = document.createElement("img");
//图片预加载
var img = new Image();
img.src = oImg.src = aLi[this.index].getElementsByTagName("img")[0].src.replace(".jpg","_big.jpg");
//插入大图片
oBig.appendChild(oImg);
//鼠标移过样式
this.className = "active";
//显示big
oBig.style.display = oLoading.style.display = "block";
//判断大图是否加载成功
img.complete ? oLoading.style.display = "none" : (oImg.onload = function() {oLoading.style.display = "none";})
};
//鼠标移动, 大图容器跟随鼠标移动
aLi[i].onmousemove = function (event)
{
var event = event || window.event;
var iWidth = document.documentElement.offsetWidth - event.clientX;
//设置big的top值
oBig.style.top = event.clientY + 20 + "px";
//设置big的left值, 如果右侧显示区域不够, 大图将在鼠标左侧显示.
oBig.style.left = (iWidth < oBig.offsetWidth + 10 ? event.clientX - oBig.offsetWidth - 10 : event.clientX + 10) + "px";

};
//鼠标离开, 删除大图并隐藏大图容器
aLi[i].onmouseout = function ()
{
this.className = "";
oBig.style.display = "none";
//移除大图片
oBig.removeChild(oBig.lastChild)
}
}
};
</script>
</head>
<body>自动判断大图显示位置，如果超出显示范围，在另一侧展示支持IE6~9-Firefox-Chrome
<div id="box">
    <ul>
     <li><img src="http://js.fgm.cc/learn/lesson5/img/shirt_1.jpg" /></li>        <li><img src="http://js.fgm.cc/learn/lesson5/img/shirt_2.jpg" /></li>
        <li><img src="http://js.fgm.cc/learn/lesson5/img/shirt_3.jpg" /></li>
        <li><img src="http://js.fgm.cc/learn/lesson5/img/shirt_4.jpg" /></li>
    </ul>
</div>
<div id="big"><div></div></div>
</body>
</html>[/html]
如果想簡單點我贊成１樓的方法。
呵呵，還有一個也不錯，更接近你的要求，不過代碼多了點，就看你取捨啦。<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Sweet Titles</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="developer" content="Dustin Diaz" />
<style type="text/css" media="screen,projection">

</style>
    <script language="javascript">
/*
Sweet Titles (c) Creative Commons 2005
http://creativecommons.org/licenses/by-sa/2.5/
Author: Dustin Diaz | http://www.dustindiaz.com
*/
Array.prototype.inArray = function (value) {
var i;
for (i=0; i < this.length; i++) {
if (this[i] === value) {
return true;
}
}
return false;
};
function addEvent( obj, type, fn ) {
if (obj.addEventListener) {
obj.addEventListener( type, fn, false );
EventCache.add(obj, type, fn);
}
else if (obj.attachEvent) {
obj["e"+type+fn] = fn;
obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
obj.attachEvent( "on"+type, obj[type+fn] );
EventCache.add(obj, type, fn);
}
else {
obj["on"+type] = obj["e"+type+fn];
}
}

var EventCache = function(){
var listEvents = [];
return {
listEvents : listEvents,
add : function(node, sEventName, fHandler){
listEvents.push(arguments);
},
flush : function(){
var i, item;
for(i = listEvents.length - 1; i >= 0; i = i - 1){
item = listEvents[i];
if(item[0].removeEventListener){
item[0].removeEventListener(item[1], item[2], item[3]);
};
if(item[1].substring(0, 2) != "on"){
item[1] = "on" + item[1];
};
if(item[0].detachEvent){
item[0].detachEvent(item[1], item[2]);
};
item[0][item[1]] = null;
};
}
};
}();
addEvent(window,'unload',EventCache.flush);
var sweetTitles = {
xCord : 0, // @Number: x pixel value of current cursor position
yCord : 0, // @Number: y pixel value of current cursor position
tipElements : ['a','abbr','acronym'], // @Array: Allowable elements that can have the toolTip
obj : Object, // @Element: That of which you're hovering over
tip : Object, // @Element: The actual toolTip itself
active : 0, // @Number: 0: Not Active || 1: Active
init : function() {
if ( !document.getElementById ||
!document.createElement ||
!document.getElementsByTagName ) {
return;
}
var i,j;
this.tip = document.createElement('div');
this.tip.id = 'toolTip';
document.getElementsByTagName('body')[0].appendChild(this.tip);
this.tip.style.top = '0';
this.tip.style.visibility = 'hidden';
var tipLen = this.tipElements.length;
for ( i=0; i<tipLen; i++ ) {
var current = document.getElementsByTagName(this.tipElements[i]);
var curLen = current.length;
for ( j=0; j<curLen; j++ ) {
addEvent(current[j],'mouseover',this.tipOver);
addEvent(current[j],'mousemove',this.tipMove);
addEvent(current[j],'mouseout',this.tipOut);
current[j].setAttribute('tip',current[j].title);
current[j].removeAttribute('title');
}
}
},
updateXY : function(e) {
if ( document.captureEvents ) {
sweetTitles.xCord = e.pageX;
sweetTitles.yCord = e.pageY;
} else if ( window.event.clientX ) {
sweetTitles.xCord = window.event.clientX+document.documentElement.scrollLeft;
sweetTitles.yCord = window.event.clientY+document.documentElement.scrollTop;
}
},
tipOut: function() {
if ( window.tID ) {
clearTimeout(tID);
}
if ( window.opacityID ) {
clearTimeout(opacityID);
}
sweetTitles.tip.style.visibility = 'hidden';
},
tipMove:function(e){
var e = e || window.event;
var o = sweetTitles;
var scrX = Number(o.xCord);
var scrY = Number(o.yCord);
var tp = parseInt(scrY+15);
var lt = parseInt(scrX+10);
o.tip.style.left = lt+'px';
o.tip.style.top = tp+'px';
sweetTitles.updateXY(e);
},
checkNode : function() {
var trueObj = this.obj;
if ( this.tipElements.inArray(trueObj.nodeName.toLowerCase()) ) {
return trueObj;
} else {
return trueObj.parentNode;
}
},
tipOver : function(e) {
sweetTitles.obj = this;
tID = window.setTimeout("sweetTitles.tipShow()",50);
sweetTitles.updateXY(e);
},
tipShow : function() {
var scrX = Number(this.xCord);
var scrY = Number(this.yCord);
var tp = parseInt(scrY+15);
var lt = parseInt(scrX+10);
var anch = this.checkNode();
var addy = '';
var access = '';
if ( anch.nodeName.toLowerCase() == 'a' ) {
addy = (anch.href.length > 25 ? anch.href.toString().substring(0,25)+"..." : anch.href);
var access = ( anch.accessKey ? ' <span>['+anch.accessKey+']</span> ' : '' );
} else {
addy = anch.firstChild.nodeValue;
}
this.tip.innerHTML = "<p>"+anch.getAttribute('tip')+"<em>"+access+addy+"</em></p>";
if ( parseInt(document.documentElement.clientWidth+document.documentElement.scrollLeft) < parseInt(this.tip.offsetWidth+lt) ) {
this.tip.style.left = parseInt(lt-(this.tip.offsetWidth+10))+'px';
} else {
this.tip.style.left = lt+'px';
}
if ( parseInt(document.documentElement.clientHeight+document.documentElement.scrollTop) < parseInt(this.tip.offsetHeight+tp) ) {
this.tip.style.top = parseInt(tp-(this.tip.offsetHeight+10))+'px';
} else {
this.tip.style.top = tp+'px';
}
this.tip.style.visibility = 'visible';
this.tip.style.opacity = '0.5';
this.tipFade(10);
},
tipFade: function(opac) {
var passed = parseInt(opac);
var newOpac = parseInt(passed+10);
if ( newOpac < 50 ) {
this.tip.style.opacity = '.'+newOpac;
this.tip.style.filter = "alpha(opacity:"+newOpac+")";
opacityID = window.setTimeout("sweetTitles.tipFade('"+newOpac+"')",20);
}
else {
this.tip.style.opacity = '0.5';
this.tip.style.filter = "alpha(opacity:50)";
}
}
};
function pageLoader() {
sweetTitles.init();
}
addEvent(window,'load',pageLoader);
</script>
</head>
<body>紧贴鼠标移动的title提示支持IE6~9-Firefox2.0,3.0,3.6-Chrome<br>
<div id="wrapper">
<p id='tagLine'><a href="http://hi.baidu.com/comasp" alt="sdfsfsdfsdfd" >
<img src="http://www.baidu.com/img/baidu_logo.gif" /></a></p>
<h1>好看的标题（鼠标移上去，提示）</h1>
<h2>By Dustin Diaz</h2>
<ul>
<li><a accesskey="y" href="http://www.yahoo.com" title="The Great Y! Corp strikes again">Go to Yahoo</a></li>
<li><a accesskey="s" href="http://www.sitepoint.com" title="Good development site. Great for learning">Go to Sitepoint</a></li>
<li><a accesskey="2" href="http://www.dustindiaz.com/sweet-titles/" title="A place to download the latest copy just incase something went wrong.">"Sweet Titles" supporting article</a></li>
<li>An acronym: <acronym title="Document Object Model">D.O.M.</acronym></li>
<li>An abbreviation: <acronym title="Extensible Hypertext Markup Language">XHTML.</acronym></li>
</ul>
<p>
<br>
<br>
</div></body>
</html>
  我用的是google 17，alt属性只能在图片不存在时进行替换显示不能在图片存在时出现文本提示WYH？？