javascript飘动,html图片飘动

这段代码是什么意思？

function Marquee()

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{ if(demo2.offsetWidth-demo.scrollLeft=0)

demo.scrollLeft-=demo1.offsetWidth

else{ demo.scrollLeft++ }

}

上面这段代码控制横向滚动条滚动

var MyMar=setInterval(Marquee,speed)

上面这段代码让浏览器每30毫秒调用一次Marquee函数

也就是让滚动条滚动

demo.onmouseover=function()

{

clearInterval(MyMar)

}

上面这段代码让当鼠标移动到demo控件上时停止调用Marquee函数

也就是说，鼠标移动到demo控件上，滚动条不再滚动

demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}

上面这段代码当鼠标从demo控件上移开始，继续每30毫秒调用一次Marquee函数

也就是让滚动条继续滚动

请教：如何用 JavaScript 做一个随机飘动的 "浮动元素"？

把下面这段代码加到BODY ........后面

DIV id=ly2

style="HEIGHT: 128px; LEFT: 0px; POSITION: absolute; TOP: 0px; WIDTH: 150px"A

href="prodlist.php?departmentid=3" target=_blankIMG

src="images/hadef.gif" border=0/A/DIV

SCRIPT

PI=3.1416;

if (window.screen.width==1024)

{

center_x=400;

center_y=300;

}

if (window.screen.width==800)

{

center_x=300;

center_y=200;

}

function _locate_layer(this_layer,cx,cy,x,y)

{

this_layer.style.top=document.body.scrollTop+cy-y;

this_layer.style.left=document.body.scrollLeft+cx+x;

}

// ly2:move sin-----------------------------------------------------

_move_sin_ly2_run=1;

_move_sin_ly2_i=0;

function _move_sin_ly2(x_step,y_step)

{

x=_move_sin_ly2_i;

y=Math.sin(x/50)*y_step;

_move_sin_ly2_i=_move_sin_ly2_i+x_step;

_locate_layer(ly2,0,center_y,x,y);

if (x(window.screen.width-250)) _move_sin_ly2_i=0;

}

function _move_sin_ly2_pro()

{

_move_sin_ly2(2,75);

if (_move_sin_ly2_run) setTimeout("_move_sin_ly2_pro()",100);

}

function _move_sin_ly2_pro_pause()

{

_move_sin_ly2_run=0;

}

function _move_sin_ly2_pro_play()

{

_move_sin_ly2_run=1;

_move_sin_ly2_pro();

}

// ly2:move sin------------------------------------------------------

_move_sin_ly2_pro();

/SCRIPT

求：能让小窗口中的文字进行旗帜式飘动的特效代码

楼主咋能这样说捏…………这是个很简答的东西…………

自己看最后一个javascript函数的注释，页面上的展示是一个DNA式的展示，其实就是两个楼主要求的东西向不同方向开始震动…………

很郁闷，20分钟完成功能，花了一个小时来优化了下代码…………

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

html

head

title旗帜飘扬.html/title

meta http-equiv="keywords" content="keyword1,keyword2,keyword3"

meta http-equiv="description" content="this is my page"

meta http-equiv="content-type" content="text/html; charset=UTF-8"

!--link rel="stylesheet" type="text/css" href="./styles.css"--

style type="text/css"

.flaggingStyle {

color: #0066ff;

font-family: 隶书;

font-size: 24pt;

font-weight: normal;

}

/style

script type="text/javascript"

function flaggingMove(strTargetName, flaggingPosNo, flaggingVolatility, messageLength) {

for (var i = messageLength - 1; i = 1; i--) {

document.getElementById("Flag_" + strTargetName + i).style.top = document.getElementById("Flag_" + strTargetName + (i - 1)).offsetTop;

}

var target = document.getElementById(strTargetName);

var nowPos = parseInt(target.getAttribute("flaggingPosition"));

var nowDir = parseInt(target.getAttribute("flaggingDrection"));

if (nowPos == flaggingPosNo || nowPos == flaggingPosNo * -1) {

nowDir = nowDir * -1;

target.setAttribute("flaggingDrection", nowDir);

}

nowPos = nowPos + nowDir;

target.setAttribute("flaggingPosition", nowPos);

document.getElementById("Flag_" + strTargetName + "0").style.top = target.offsetTop + flaggingVolatility * Math.sin(Math.PI * nowPos / 2 / flaggingPosNo);

}

function flaggingReColor(strTargetName, messageLength) {

for (var i = messageLength - 1; i = 1; i--) {

document.getElementById("Flag_" + strTargetName + i).style.color = document.getElementById("Flag_" + strTargetName + (i - 1)).style.color;

}

document.getElementById("Flag_" + strTargetName + "0").style.color = Math.random() * 255 * 255 * 255 + Math.random() * 255 * 255 + Math.random() * 255;

}

function startFlagging(strCtrlName, flaggingPosNo, flaggingVolatility, messageLength, flaggingTerm, reColorTerm){

window.setInterval("flaggingMove('" + strCtrlName + "', " + flaggingPosNo + ", " + flaggingVolatility + ", " + messageLength + ");", flaggingTerm);

window.setInterval("flaggingReColor('" + strCtrlName + "', " + messageLength + ");", reColorTerm);

}

/**

* strFlaggingMessage 字符串，信息内容

* textwidth 数字，信息字符的宽度

* flaggingPosNo 数字，半周期变化位置的次数

* startPos 数字，小于等于flaggingPosNo，开始位置

* startDir 数字，1或-1，开始时字符移动的方向（向上或向下）

* flaggingVolatility 数字，字符每次移动的距离，flaggingVolatility*flaggingPosNo*2=字符震动的幅度

* flaggingTerm 数字，字符每隔多少毫秒移动一次，flaggingTerm*flaggingPosNo*4=字符震动的周期

* reColorTerm 数字，字符颜色每隔多少毫秒变化一次

* flaggingClass 字符串，定义字符的css的classname

function flaggingCtrl(strFlaggingMessage, textwidth, flaggingPosNo, startPos, startDir, flaggingVolatility, flaggingTerm, reColorTerm, flaggingClass) {

var strCtrlName = "FlaggingMessageCtl";

if(document.getElementById(strCtrlName)){

var i = 0;

while(document.getElementById(strCtrlName + "_" + i)){

i = i + 1;

}

strCtrlName = strCtrlName + "_" + i;

}

document.write("span id=\"" + strCtrlName + "\"/span");

var target = document.getElementById(strCtrlName);

var x = target.offsetLeft;

var y = target.offsetTop;

target.style.position = "absolute";

target.setAttribute("flaggingPosition", startPos);

target.setAttribute("flaggingDrection", startDir);

var messageArr = strFlaggingMessage.split("");

for (i = 0; i = messageArr.length - 1; i++) {

var newSpan = document.createElement("span");

newSpan.innerText = messageArr[i];

newSpan.setAttribute("id", "Flag_" + strCtrlName + i);

newSpan.className = flaggingClass;

newSpan.style.position = "absolute";

newSpan.style.top = y;

newSpan.style.left = x + i * textwidth;

document.body.appendChild(newSpan);

}

startFlagging(strCtrlName, flaggingPosNo, flaggingVolatility, messageArr.length, flaggingTerm, reColorTerm);

}

/script

/head

body

br /

script type="text/javascript"

flaggingCtrl("准备要像旗帜飘扬般晃动的信息1………………", 35, 4, 0, -1, 50, 35, 300, "flaggingStyle");

/script

script type="text/javascript"

flaggingCtrl("准备要像旗帜飘扬般晃动的信息2………………", 35, 4, 0, 1, 50, 35, 300, "flaggingStyle");

/script

/body

/html

如何在网页内设置自己喜欢的图片飘动拜托各位大神

DIV id=img style="position:absolute;z-index=99;" A href="#" target=_blankIMG height=80 width=80 alt="dfs" src="#" border=0 /A/DIV SCRIPT language=javascript !-- Begin var xPos = 20; var yPos = document.body.clientHeight; var step = 1; var delay = 30; var height = 0; var Hoffset = 0; var Woffset = 0; var yon = 0; var xon = 0; var pause = true; var interval; img.style.top = yPos; function changePos() { width = document.body.clientWidth; height = document.body.clientHeight; Hoffset = img.offsetHeight; Woffset = img.offsetWidth; img.style.left = xPos + document.body.scrollLeft; img.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() { img.visibility = "visible"; interval = setInterval('changePos()', delay); } start(); // End -- /SCRIPT 把代码复制到你的网页中