当然，想到这里，当不需要祝贺词的节日只需要将对应的祝贺词隐藏就行了（因为本菜鸟不是专注做UI的，所以这里着实花了几个小时的时间），不过总算有了预期的成果，好了，拿出来和有类似需求的童鞋们分享一下。
<!--advertisement code in html body--> <body> <!-- for advertisement note: take the right pic path below and in ad.js path total four place--> <div id="oImg" style="position: absolute; z-index: 100; top: 0; left: 0; width: 180px; height: 70px;"> <a href="http://gh.swpu.edu.cn" target="_blank"> <img src="festival/3.jpg" id=‘imgId‘ style=‘display:none‘/> </a> </div> <script type="text/javascript" src="festival/ad.js"></script> <!--end for advertisement --> </body>
// out link javascript code in ad.js
window.onload = function()
{
var img = document.getElementById(‘imgId‘);
var src = img.getAttribute(‘src‘);
// care the right file path : festival/
var month = (new Date().getMonth()+1).toString();
//alert(month);
if(month == ‘1‘ ||month == ‘3‘ || month == ‘5‘ || month == ‘9‘||month == ‘10‘ )
{
img.setAttribute(‘src‘,‘festival/‘+month+‘.jpg‘);
img.style.display = "block";
}
else
{
var div = document.getElementById(‘oImg‘);
img.style.display = "none";
div.style.display = "none"; //隐藏而不删除
}
};
var floatImg = document.getElementById("oImg");
var delay = 10; //控制每次执行间隔的时间，做越大移动得越慢；
var speed = 1; //控制每次执行移动的距离，值越大移动得越快；
var flagX = 0;
var flagY = 0;
function toPixel(str1) {
//该函数用于去掉数值后面的px，并将之转化为数字。
var oldLen = str1.length;
var newLen = oldLen - 2;
str2 = str1.slice(0, newLen);
str3 = parseInt(str2);
return str3;
}
function flowImg() {
var bWidth = document.body.clientWidth;
var bHeight = document.body.clientHeight;
var bLeft = document.body.scrollLeft;
var bTop = document.body.scrollTop;
var iWidth = floatImg.offsetWidth;
var iHeight = floatImg.offsetHeight;
var iLeft = toPixel(floatImg.style.left);
var iTop = toPixel(floatImg.style.top);
//下面一段控制横向移动
if(iLeft < (bWidth - iWidth) && flagX == 0) {
floatImg.style.left = (iLeft + speed) + "px";
}
else if(iLeft >= (bWidth - iWidth) && flagX ==0) {
flagX = 1;
}
else if(iLeft > 0 && flagX == 1) {
floatImg.style.left = (iLeft - speed) + "px";
}
else if(0 >= iLeft && flagX == 1) {
flagX = 0;
}
//下面一段控制纵向移动
if(iTop < (bHeight - iHeight) && flagY == 0) {
floatImg.style.top = (iTop + speed) + "px";
}
else if(iTop >= (bHeight - iHeight) && flagY ==0) {
flagY = 1;
}
else if(iTop > 0 && flagY == 1) {
floatImg.style.top = (iTop - speed) + "px";
}
else if(0 >= iTop && flagY == 1) {
flagY = 0;
}
}
var imgInterval = setInterval("flowImg()", delay);
floatImg.onmouseover = function() {clearInterval(imgInterval);}
floatImg.onmouseout = function() {imgInterval = setInterval("flowImg()", delay);}
注意：我的图片和ad.js文件都是在和html 文件同级festival 文件夹下
下面呈上我用到的几张素材祝贺词图片，如果有需要的直接下载下来改下名字就行了（最后一张图片无法显示，我把原版的javascript 文件 改后缀后上传了，要下载的自便）：
一款兼容性好，自动变化的javascript 祝贺词代码（根据不同的节日自动显示不同的祝贺词）,布布扣,bubuko.com