编程 Javascript

js浮动图片的动态效果

Posted in Javascript onJuly 10, 2013

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>浮动图片</title>
<script type="text/javascript">
var step = 1; // 移动的像素
var y = -1; // 垂直移动的方向，-1表示向上，1表示向下
var x = 1; // 水平移动的方向，-1表示向左，1表示向右
function myFloat()
{
var img = document.getElementById("myImg");
// 获取图片和当前浏览器窗口上边距，由于img.style.top获取的值带px单位
var top = img.style.top.replace("px", "");
// top = top - 100;
// img.style.top = top + "px";
// 获取图片和当前浏览器窗口左边距
var left = img.style.left.replace("px", "");
// left = left - 100;
// img.style.left = left + "px";
// 上下移动
if(top <= 0)
{
y = 1;
}
if(top >= document.body.clientHeight)
{
y = -1;
}
top = (top*1) + (step * y);
img.style.top = top + "px";
// 左右移动
if(left <= 0)
{
x = 1;
}
// alert(img.clientWidth);
if(left >= (document.body.clientWidth - img.clientWidth))
{
x = -1;
}
left = (left*1) + (step * x);
img.style.left = left + "px";
setTimeout("myFloat()", 20);
}
</script>
</head>
<body onload="myFloat();" style="height: 400px;">
<img id="myImg" src="//img.jbzj.com/file_images/article/201307/2013071009420928.png"
style="position: absolute; left: 500px; top: 400px; border: solid 1px black;" />
</body>
</html>

另一种的实现方式

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>浮动广告实例</title>
<script type="text/javascript">
    var pos = 10;
    function toueme() {
        document.getElementById("toubiao").style.display = "none";
    }
    function initArray() {
        this.length = initArray.arguments.length;
        for (var i = 0; i < this.length; i++) {
            this[i] = initArray.arguments[i];
        }
    }
    var col = new initArray("4b", "5b", "8b", "8b");
    col[0] = "yellow";
    col[1] = "coral";
    col[2] = "orange";
    col[3] = "red";
    col[4] = "greenyellow";
    col[5] = "lime";
    col[6] = "turquoise";
    col[7] = "coral";
    col[8] = "blueviolet";
    col[9] = "violet";
    function chgCol() {
        pos++;
        if (pos < 0 || pos > 9) {
            pos = 0;
        }
        document.bgColor = col[pos];
        setTimeout("chgCol()", 500);
    }
</script>
</head>
<body bgColor="#ffffff" onload="chgCol();pingpong();">
<DIV id=img1
     style="Z-INDEX: 100;
     LEFT: 12px;
     WIDTH: 159px;
     POSITION: absolute;
     TOP: 143px;
     HEIGHT: 161px;
 visibility: visible;">
 <div id=toubiao>
     <a style="CURSOR: hand" onClick=toueme()>
    <img
      src="close.gif"
      width=84 height=11 hspace="6" border=0></a>
 </div>
 <a href="#" target="_blank">
 <img src="1.jpg" width="280" height="280" border="0">
 </a>
 </DIV>
<SCRIPT>
var xPos = 0;
var yPos = 0;
var step = 3;
var delay = 100;
var height = 0;
var Hoffset = 0;
var Woffset = 0;
var yon = 0;
var xon = 0;
var pause = true;
var interval;
img1.style.top = yPos;
function changePos()
{
    width = document.body.clientWidth; //获取浏览器的宽度
    height = document.body.clientHeight; //获取浏览器的高度
Hoffset = img1.offsetHeight;
Woffset = img1.offsetWidth;
img1.style.left = xPos + document.body.scrollLeft;
img1.style.top = yPos + document.body.scrollTop;
if (yon)
{yPos = yPos + step;}
else
{yPos = yPos - step;}
if (yPos < 0)
{yon = 1;yPos = 0;}
if (yPos >= (height - Hoffset))
{yon = 0;yPos = (height - Hoffset);}
if (xon)
{xPos = xPos + step;}
else
{xPos = xPos - step;}
if (xPos < 0)
{xon = 1;xPos = 0;}
if (xPos >= (width - Woffset))
{xon = 0;xPos = (width - Woffset);   }
}
function start()
{
img1.visibility = "visible";
interval = setInterval('changePos()', delay);
//interval = setTimeout("changePos()", delay);
}
function pause_resume()
{
if(pause)
{
clearInterval(interval);
pause = false;}
else
{
interval = setInterval('changePos()',delay);
pause = true;
}
}
start();
</SCRIPT>
</body>
</html>

JS实现气泡从水中急速上升效果

<html>
<head>
<title>JS实现气泡从水中急速上升效果</title>
<style type="text/css">
body {cursor:crosshair;margin:0; padding:0; position:absolute; overflow:hidden; background:#FFF; left:0; top:0; width:100%; height:100%;}
</style>
<script type="text/javascript">
var object = new Array();
nbfm   = 60;
var xm = 0;
var ym = 9999;
var nx = 0;
var ny = 0;
function movbulb(){
 with (this) {
  if(ec < 20){
   if(Math.abs(x0 - xm) < 100 && Math.abs(y0 - ym) < 100){
    xx = (xm - x0) / 8;
    yy = (ym - y0) / 8;
    ec++;
   }
  }
  xx *= 0.99;
  yy *= 0.99;
  x0 = Math.round(x0 + Math.cos(y0 / 15) * p) + xx;
  y0+= yy - v;
  if(y0 < -h * 2 || x0 < -w * 2 || x0 > nx + w * 2){
   y0 = ny + N + h * 2;
   x0 = nx/2-100 + Math.random() * 100;
   ec = 0;
  }
  obj.style.top  = y0 - h;
  obj.style.left = x0 - w;
 }
}
function CObj(N,img,w,h){
 this.obj = document.createElement("img");
 this.obj.src = img.src;
 this.obj.style.position = "absolute";
 this.obj.style.left = -1000;
 document.body.appendChild(this.obj);
 this.N  = N;
 this.x0 = 0;
 this.y0 = -1000;
 this.v  = 1 + Math.round((80 / h) * Math.random());
 this.p  = 1 + Math.round((w / 8) * Math.random());
 this.xx = 0;
 this.yy = 0;
 this.ec = 0;
 this.w  = w;
 this.h  = h;
 this.movbulb = movbulb;
}
function resize(){
 nx = document.body.offsetWidth;
 ny = document.body.offsetHeight;
}
onresize = resize;
document.onmousemove = function(e){
 if (window.event) e = window.event;
 xm = document.body.scrollLeft+(e.x || e.clientX);
 ym = document.body.scrollTop+(e.y || e.clientY);
}
function run(){
 for(i in object)object[i].movbulb();
 setTimeout(run, 16);
}
onload = function() {
 PIC = document.getElementById("bubbles").getElementsByTagName("img");
 resize();
 for(nbf=0;nbf<nbfm;nbf++){
  sf = PIC[nbf%PIC.length];
  object[nbf] = new CObj(nbf,sf,sf.width/2,sf.height/2);
 }
 run();
}
</script>
</head>
<body>
<div id="bubbles" style="visibility:hidden">
 <img src="smile.gif">
 <img src="biggrin.gif">
 <img src="eek.gif">
 <img src="rolleyes.gif">
</div>
</body>
</html>

浮动广告

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>浮动广告</title>
</head>
<body style="background-color:pink">
<div id="ad" style="position:absolute">
<a href=http://www.baidu.com target="_blank">
<img src="2.gif" border="0" width="120" heigth="80">
<input type="button" value="关闭窗口" onclick="closeWindow()"/><!-- 适用于IE浏览器 -->
</a>
</div>
<script type="text/javascript">
var x = 400,y = 300
var xin = true, yin = true
var step = 1
var delay = 25
var obj=document.getElementById("ad")
function floatAD()
{
var L=T=0
var R= document.body.clientWidth-obj.offsetWidth
var B = document.body.clientHeight-obj.offsetHeight
obj.style.left = x + document.body.scrollLeft
obj.style.top = y + document.body.scrollTop
x = x + step*(xin?1:-1)
if (x < L) { xin = true; x = L}
if (x > R){ xin = false; x = R}
y = y + step*(yin?1:-1)
if (y < T) { yin = true; y = T }
if (y > B) { yin = false; y = B }
}
var itl= setInterval("floatAD()", delay)
function closeWindow()
{
                      window.close();
                   }
</script>
<style type="text/css">
input{
   background-image:url(638.jpg);
   border:0px;
   margin:0px;
   padding:0px;
   height:23px;
   width:82px;
   font-size:14px;
}
</style>
</body>
</html>

js浮动图片的动态效果

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

Javascript 相关文章推荐

Js 获取HTML DOM节点元素的方法小结

Apr 24 Javascript

基于jQuery实现点击同时更改两个iframe的网址

Jul 01 Javascript

js获取客户端网卡的IP地址、MAC地址

Mar 26 Javascript

使用jQuery实现更改默认alert框体

Apr 13 Javascript

JavaScript 事件入门知识

Apr 13 Javascript

基于JavaScript创建动态Dom

Dec 08 Javascript

Vue.js每天必学之指令系统与自定义指令

Sep 07 Javascript

Bootstrap3 多选和单选框(checkbox)

Dec 29 Javascript

Angularjs中ng-repeat-start与ng-repeat-end的用法实例介绍

Dec 31 Javascript

原生js实现无缝轮播图效果

Jan 11 Javascript

详解Angular 4 表单快速入门

Jun 05 Javascript

微信小程序生成二维码的示例代码

Mar 29 Javascript

JS文本框默认值处理详解

Jul 10 #Javascript

JS实现点击下载的小例子

Jul 10 #Javascript

javascript 得到文件后缀名的思路及实现

May 09 #Javascript

让js弹出窗口居前显示的实现方法

Jul 10 #Javascript

JavaScript:new 一个函数和直接调用函数的区别分析

Jul 10 #Javascript

浅析onsubmit校验表单时利用ajax的return false无效问题

Jul 10 #Javascript

JavaScript 模拟类机制及私有变量的方法及思路

Jul 10 #Javascript