请教:如何用 JavaScript 做一个随机飘动的 "浮动元素"?

发布网友发布时间：2022-05-16 06:46

共2个回答

懂视网时间：2022-05-16 11:07

该程序是我从别人的网站上分析出来的！由于对方的网站使用了框架，而且又取消了鼠标的右键功能，因此费了好长时间！
当你浏览该页时，工具条始终浮在左上角，你若不喜欢，可以自己调节摆放位置！若想多页使用该代码，可以把jsp程序部分写成JS的文件，然后再通过调用来实现，有不明白的地方，欢迎各位与我交流！
演示地址：http://www.85time.com/softuse/bar.htm
<HTML>
<HEAD>
<TITLE></TITLE>
<META http-equiv="Content-Type" content="text/html; charset=gb2312">
<STYLE type="text/CSS">
.wdBlack{ font-size:9pt; line-height:11pt; font-family:宋体; color:black }
.wdGray{ font-size:9pt; line-height:11pt; font-family:宋体; color:#CCCCCC }
.wdBlue{ font-size:9pt; line-height:11pt; font-family:宋体; color:#2F8BDF }
.wdRed{ font-size:9pt; line-height:11pt; font-family:宋体; color:red }
.wdWhite{ font-size:9pt; line-height:11pt; font-family:宋体; color:white }
.moveme{cursor: move;}
.handle{cursor: move;}
.coolBar{background: #fffffc;border-top: 1px solid buttonhighlight; border-left: 1px solid buttonhighlight; border-bottom: 1px solid buttonshadow; border-right: 1px solid buttonshadow; padding: 2px; font: menu;}
.coolButton{font-size:9pt;border: 1px solid buttonface; padding: 1px; text-align: center; cursor: hand;color:#555555}
.coolButton IMG {filter: gray();} div{ font-size:9pt; line-height:11pt; font-family:宋体; color:black }
Text{ font-size:9pt; line-height:11pt; font-family:宋体; color:black }
INPUT{ font-size:9pt; line-height:11pt; font-family:宋体; color:black }
table{ font-size:9pt; line-height:11pt; font-family:宋体; color:black }
body{ font-size:9pt; line-height:11pt; font-family:宋体; color:black }
form{ font-size:9pt; line-height:11pt; font-family:宋体; color:black }

A:link{ font-size:9pt; font-family:宋体; text-decoration: none; color:#2F8BDF }
A:visited{ font-size:9pt; font-family:宋体; text-decoration: none; color:#2F8BDF }
A:hover{ font-size:9pt; font-family:宋体; text-decoration: underline; color:#FF0000 }
</STYLE>

<script language="javascript">
var dragobject = null;
var tx;
var ty;
document.onmouSEOver = doOver;
document.onmouseout = doOut;
document.onmousedown = doDown;
document.onmouseup = doUp;
document.onmousedown=initDown;
document.onmouseup=initUp;
document.onmousemove=initMove;
function stat(){
var a = pageYOffset;
document.bar.top = a;
setTimeout('stat()',2);
}
function fix(){
nome=navigator.appName
if(nome=='Netscape') stat();
else{
var a=document.body.scrollTop;
var b=document.body.scrollLeft;
bar.style.top = a;
bar.style.left = b;
}
}
function getReal(el) {
temp = el;
while ((temp != null) && (temp.tagName != "BODY")) {
if ((temp.className == "moveme") || (temp.className == "handle")){
el = temp;
return el;
}
temp = temp.parentElement;
}
return el;
}
function moveme_onmousedown() {
el = getReal(window.event.srcElement)
if (el.className == "moveme") {
dragobject = el;
ty = (window.event.clientY - dragobject.style.pixelTop);
tx = (window.event.clientX - dragobject.style.pixelLeft);
window.event.returnValue = false;
window.event.cancelBubble = true;
}else if (el.className == "handle") {
tmp = el.getAttribute("for");
if (tmp != null) {
el = eval(tmp);
dragobject = el;
ty = (window.event.clientY - dragobject.style.pixelTop);
tx = (window.event.clientX - dragobject.style.pixelLeft);
window.event.returnValue = false;
window.event.cancelBubble = true;
} else {
dragobject = null;
}
}else {
dragobject = null;
}
}
function moveme_onmouseup() {
if(dragobject) {
dragobject = null;
}
}
function moveme_onmousemove() {
if (dragobject) {
if(window.event.clientX >= 0) {
dragobject.style.left = window.event.clientX - tx;
dragobject.style.top = window.event.clientY - ty;
}
window.event.returnValue = false;
window.event.cancelBubble = true;
}
}
if (document.all) {
document.onmousedown = moveme_onmousedown;
document.onmouseup = moveme_onmouseup;
document.onmousemove = moveme_onmousemove;
}
function doOver() {
var toEl = getReal(window.event.toElement, "className", "coolButton");
var fromEl = getReal(window.event.fromElement, "className", "coolButton");
if (toEl == fromEl) return;
var el = toEl;
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null);
if (el.className == "coolButton")
el.onselectstart = new Function("return false");
if ((el.className == "coolButton") && !cDisabled) {
makeRaised(el);
makeGray(el,false);
}
}
function doOut() {
var toEl = getReal(window.event.toElement, "className", "coolButton");
var fromEl = getReal(window.event.fromElement, "className", "coolButton");
if (toEl == fromEl) return;
var el = fromEl;
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null);
var cToggle = el.cToggle;
toggle_disabled = (cToggle != null);
if (cToggle && el.value) {
makePRessed(el);
makeGray(el,true);
}
else if ((el.className == "coolButton") && !cDisabled) {
makeFlat(el);
makeGray(el,true);
}
}
function doDown() {
el = getReal(window.event.srcElement, "className", "coolButton");
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null);
if ((el.className == "coolButton") && !cDisabled) {
makePressed(el)
}
}
function doUp() {
el = getReal(window.event.srcElement, "className", "coolButton");
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null);
if ((el.className == "coolButton") && !cDisabled) {
makeRaised(el);
}
}
function getReal(el, type, value) {
temp = el;
while ((temp != null) && (temp.tagName != "BODY")) {
if (eval("temp." + type) == value) {
el = temp;
return el;
}
temp = temp.parentElement;
}
return el;
}
function findChildren(el, type, value) {
var children = el.children;
var tmp = new Array();
var j=0;
for (var i=0; i<children.length; i++) {
if (eval("children[i]." + type + "=="" + value + """)) {
tmp[tmp.length] = children[i];
}
tmp = tmp.concat(findChildren(children[i], type, value));
}
return tmp;
}
function disable(el) {
if (document.readyState != "complete") {
window.setTimeout("disable(" + el.id + ")", 100);
return;
}
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null);
if (!cDisabled) {
el.cDisabled = true;
el.innerHTML = '<span style="background: buttonshadow; width: 100%; height: 100%; text-align: center;border:1px">' +
'<span style="filter:Mask(Color=buttonface) DropShadow(Color=buttonhighlight, OffX=1, OffY=1, Positive=0); height: 100%; width: 100%%; text-align: center;border:1px">' +
el.innerHTML +
'</span>' +
'</span>';
if (el.onclick != null) {
el.cDisabled_onclick = el.onclick;
el.onclick = null;
}
}
}
function enable(el) {
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null);
if (cDisabled) {
el.cDisabled = null;
el.innerHTML = el.children[0].children[0].innerHTML;
if (el.cDisabled_onclick != null) {
el.onclick = el.cDisabled_onclick;
el.cDisabled_onclick = null;
}
}
}
function addToggle(el) {
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null);
var cToggle = el.cToggle;
cToggle = (cToggle != null);
if (!cToggle && !cDisabled) {
el.cToggle = true;
if (el.value == null)
el.value = 0;
if (el.onclick != null)
el.cToggle_onclick = el.onclick;
else
el.cToggle_onclick = "";
el.onclick = new Function("toggle(" + el.id +"); " + el.id + ".cToggle_onclick();");
}
}
function removeToggle(el) {
var cDisabled = el.cDisabled;
cDisabled = (cDisabled != null);
var cToggle = el.cToggle;
cToggle = (cToggle != null);
if (cToggle && !cDisabled) {
el.cToggle = null;
if (el.value) {
toggle(el);
}
makeFlat(el);
if (el.cToggle_onclick != null) {
el.onclick = el.cToggle_onclick;
el.cToggle_onclick = null;
}
}
}
function toggle(el) {
el.value = !el.value;
if (el.value)
el.style.background = "URL()";
else
el.style.backgroundImage = "";
}
function makeFlat(el) {
with (el.style) {
background = "";
border = "1px solid buttonface";
padding = "1px";
}
}
function makeRaised(el) {
with (el.style) {
borderLeft = "1px solid #2F8BDF";
borderRight = "1px solid #2F8BDF";
borderTop = "1px solid #2F8BDF";
borderBottom = "1px solid #2F8BDF";
padding = "1px";
}
}
function makePressed(el) {
with (el.style) {
borderLeft = "1px solid buttonhighlight";
borderRight = "1px solid buttonshadow";
borderTop = "1px solid buttonhighlight";
borderBottom = "1px solid buttonshadow";

paddingTop = "2px";
paddingLeft = "2px";
paddingBottom = "0px";
paddingRight = "0px";
}
}
function makeGray(el,b) {
var filtval;
if (b)
filtval = "gray()";
else
filtval = "";
var imgs = findChildren(el, "tagName", "IMG");
for (var i=0; i<imgs.length; i++) {
imgs[i].style.filter = filtval;
}
}
function load(ws) {
parent.location.href=ws;
}
function initDown() {
doDown();
moveme_onmousedown();
}
function initUp() {
doUp();
moveme_onmouseup();
}
function initMove() {
moveme_onmousemove();
}
</script>
</HEAD>
<BODY onLoad='fix()' onScroll="fix()" onResize="fix()">
<span id="bar" style="position:absolute;left:0px;top:0px;width:500px; height:1px; z-index:9">
<table class=coolBar id=toolbar1 width=100%>
<tr>
<td class=coolButton onclick="Javascript:self.location='http://www.85time.com/85time/'">网友论坛</td>
<td class=coolButton onclick="javascript:self.location='http://www.85time.com/engine.htm'">实用引擎</td>
<td class=coolButton onclick="javascript:self.location='http://www.85time.com/opus/opus.htm'">推荐作品</td>
<td class=coolButton onclick="javascript:self.location='http://www.85time.com/gb/'">留言板</td>
<td class=coolButton onclick="javascript:self.location='http://www.85time.com/chat/'">聊天室</td>
</tr>
</table>
</span>
</body>
</html>

热心网友时间：2022-05-16 08:15

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=_blank><IMG
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>

请教:如何用 JavaScript 做一个随机飘动的 &quot;浮动元素&quot;?

请教:如何用 JavaScript 做一个随机飘动的 "浮动元素"?