纯JS半透明Tip效果代码

<!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> 
<title>Test</title> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<script type="text/ecmascript"> 
function opacity(id, opacStart, opacEnd, millisec) { 
//speed for each frame 
var speed = Math.round(millisec / 100); 
var timer = 0; 
//determine the direction for the blending, if start and end are the same nothing happens 
if(opacStart > opacEnd) { 
for(i = opacStart; i >= opacEnd; i--) { 
setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
timer++; 
} 
} else if(opacStart < opacEnd) { 
for(i = opacStart; i <= opacEnd; i++) 
{ 
setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
timer++; 
} 
} 
} 
//change the opacity for different browsers 
function changeOpac(opacity, id) { 
var obj = document.getElementById(id); 
if (obj) { 
var s = obj.style; 
s.opacity = (opacity / 100); 
s.MozOpacity = (opacity / 100); 
s.KhtmlOpacity = (opacity / 100); 
s.filter = "alpha(opacity=" + opacity + ")"; 
s = null; 
} 
} 
function shiftOpacity(id, millisec) { 
//if an element is invisible, make it visible, else make it ivisible 
if(document.getElementById(id).style.opacity == 0) { 
opacity(id, 0, 100, millisec); 
} else { 
opacity(id, 100, 0, millisec); 
} 
} 
function blendimage(divid, imageid, imagefile, millisec) { 
var speed = Math.round(millisec / 100); 
var timer = 0; 
//set the current image as background 
document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")"; 
//make image transparent 
changeOpac(0, imageid); 
//make new image 
document.getElementById(imageid).src = imagefile; 
//fade in image 
for(i = 0; i <= 100; i++) { 
setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed)); 
timer++; 
} 
} 
function currentOpac(id, opacEnd, millisec) { 
//standard opacity is 100 
var currentOpac = 100; 
//if the element has an opacity set, get it 
if(document.getElementById(id).style.opacity < 100) { 
currentOpac = document.getElementById(id).style.opacity * 100; 
} 
//call for the function that changes the opacity 
opacity(id, currentOpac, opacEnd, millisec) 
}

function showContent(i, event){ 
showid = "content" + i; 
var target = document.getElementById(showid); 
target.style.position = "absolute"; 
if(navigator.appName!="Netscape"){ 
event=window.event; 
event.srcElement.style.fontWeight = "700"; 
} else { 
event.target.style.fontWeight = "700"; 
} 
target.style.top = event.clientY + 22 +"px"; 
target.style.left = event.clientX + 12 + "px";

//复制一个背景 
var bg = target.cloneNode(true); 
if (bg) { 
bg.id="bg1"; 
if (bg.style.backgroundColor.length==0) { 
bg.style.backgroundColor ="#FFFFE1"; 
} 
bg.style.filter = "alpha(opacity=0)"; 
bg.style.opacity = 0; 
target.parentNode.appendChild(bg);

opacity("bg1", 0, 90, 300); 
bg.style.display="block"; 
}

target.style.display = "block"; 
}

<body>

链接 
<div id="content0" style="width:200px;height:300px;padding:2em;display:none"> 这是文章标题1，文字是不透明的 
</div> 
<span onmouseover="showContent(1, event)" onmouseout="hiddenContent(1, event)" 
style="cursor:default">有提示文字</span> 
<div id="content1" style="width:200px;height:300px;padding:2em;display:none;font-weight:700"> 这是文章标题2，文字是不透明的 
</div>

<div style="width:34%;color:#226"> 
<p>教育是开启完全不同未来大门的重要钥匙。在美国十大城市中，要求 
中学以下文化程度的职位数从 1970 年起已经减少了一半。从 1989 年起， 
美国新设职位的 2/3 都是专业人员和管理人员(38)。在德国，到 2010 年 
将只有 10％的职位适合非技术工人，而在 1976 年为 35％。(39) </p> 
<p>但这并不只是一个失业问题。失业的年轻人倾向于从事更多的暴力犯 
罪，并不愿担当家长的责任。"青春期男孩是最反复无常并最具暴力的了。 
美国一半的暴力犯罪是由 24 岁以下的男孩干的，四分之一的暴力犯罪事 
件是由 18 岁以下男孩干的。大多数西方国家的数据也与美国相似。"</p> 
</div> 
</body> 
</html>

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纯JS半透明Tip效果代码_javascript技巧