Marquee's universal js class for subtitle effects compatible with multiple browsers_link effects

Marquee.js

Parameter description:
demo The ID of the subtitle area tag (div);
demo1/demo2 The ID of the display content tag (div or td) demo1 is the original content, demo2 is its Copy;
direction subtitle direction (up, down, left, right);
delay delay time of subtitle playback (milliseconds);
step step size of subtitle playback (i.e. pix, the smaller the step size, such as step=1, the scrolling is smoother)



function Marquee (demo, demo1, demo2, direction, delay, step)
{
direction = direction.toLowerCase();

if(((direction == "up" || direction == "down") && ($(demo1).offsetHeight > $(demo).offsetHeight)) || ((direction == " left" || direction == "right") && ($(demo1).offsetWidth > $(demo).offsetWidth)))
{
$(demo2).innerHTML = $(demo1).innerHTML;
if(direction == "down")
$(demo).scrollTop = 2 * $(demo1).offsetHeight - $(demo).offsetHeight;
if(direction == "right")
$(demo).scrollLeft = 2 * $(demo1).offsetWidth - $(demo).offsetWidth;
}
else
return;

var flag = true;
var speed = delay == null? 1 : parseInt(delay);
var amount = step == null? 1 : parseInt(step);

var Marquee = function ()
{
switch(direction)
{
case "up":
if($(demo2).offsetTop - $(demo).scrollTop $(demo) .scrollTop -= $(demo1).offsetHeight;
else
$(demo).scrollTop = amount;
break;
case "down":
if($(demo1). offsetTop - $(demo).scrollTop >= 0)
$(demo).scrollTop = $(demo2).offsetHeight;
else
$(demo).scrollTop -= amount;
break ;
case "left":
if($(demo2).offsetWidth - $(demo).scrollLeft $(demo).scrollLeft -= $(demo1).offsetWidth;
else
$(demo).scrollLeft = amount;
break;
case "right":
if($(demo).scrollLeft $(demo) .scrollLeft = $(demo2).offsetWidth;
else
$(demo).scrollLeft -= amount;
break;
default:break;
}
}

var timer = setInterval(Marquee,speed);

var play = function ()
{
if(flag)
{
clearInterval(timer);
timer = setInterval(Marquee, speed);
}
}

$(demo).onmouseover = function ()
{
if(flag)
clearInterval( timer);
}

$(demo).onmouseout = function ()
{
if(flag)
timer = setInterval(Marquee, speed);
}

this.delay = function (s)
{
speed = s == null? 50 : parseInt(s);
play();
}

this.step = function (s)
{
amount = s == null? 1 : parseInt(s);
play();
}

this. start = function ()
{
if(!flag)
{
flag = true;
play();
}
}

this .stop = function ()
{
if(flag)
{
flag = false;
clearInterval(timer);
}
}

this.direction = function (s)
{
s = s.toLowerCase();
if( s == direction )
return;
if(s == "down" && direction == "up" )
direction = s;
if(s == "up" && direction == "down")
direction = s;
if (s == "right" && direction == "left")
direction = s;
if(s == "left" && direction == "right")
direction = s;
if (s == direction)
play();
}
}

The $ or $F used in the above js, if you have used prototype.js, put Just add it; otherwise you need to reference the following js file first: Ruby.js (cut from prototype.js haha)



function Ruby ()
{
}

if (!Array.prototype.push) {
Array.prototype.push = function() {
var startLength = this.length;
for (var i = 0; i this[startLength i] = arguments[i];
return this.length;
}
}

$ = function ()
{
var elements = new Array();

for (var i = 0; i var element = arguments[i];
if (typeof element == ''string'')
element = document.getElementById(element);

if (arguments.length == 1)
return element;

elements.push(element);
}

return elements;
}

$F = function ()
{
if(arguments .length == 1)
return document.getElementById(arguments[0]).value;
else
{
var elements = new Array();
for(var i = 0 ;i {
elements.push(document.getElementById(arguments[i]).value);
}
return elements;
}
}

At this point, the js file has been completed, let’s start writing the HTML code:

(1) Add the css style first, if you don’t want the content in the scrolling subtitles to be expanded for no reason (yes time)
.wrap{word-break:break-all;overflow:hidden}


(2) Add js file --> Used prototype.js is better, replace Ruby.js :)





(3) Add subtitle area content

1. Scroll up or down

=Top=

M-Zone Tariff Guide 1 M-Zone Tariff Guide 2
=Bottom=

<script></script> <script></script> <script>var obj1 = new Marquee("d1","d11","d12","up");</script>
  <script>var obj1 = new Marquee("d1","d11","d12","up");</script>
由于字幕d1的height=200,而d11的内容高度不足200,故字幕默认不会滚动,要实现滚动的话,只需d11的height>200就行了,故只需在d11的里面再放个空div就行了,让它的height=200; 如果d11的内容高度大于了200px,则字幕区域d1将无间断滚动

2. 向左或向右滚动

  
   
    
    
   
  

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 <script>var obj2 = new Marquee("d2","d21","d22","left");</script>

实现原理同上,至于为什么这里要用table而不用div,是因为div在默认情况只能判断height,而不能判断width,而table却恰恰相反,上面用到的nobr标签也是必需的,防止字幕自动换行!

附:  更改延迟播放速度 obj2.delay(50); 或 obj2.delay("50");
　　更改播放步长　　obj2.step(50); 或 obj2.step("50");
　　停止播放 obj2.stop(); 　继续播放 obj2.start();
　　更改播放方向(同类型方向)　　obj2.direction("right");