字幕滚动效果（四）-JS特效-爱易网页

字幕滚动效果（四）

日期：2014-05-18　浏览次数：20200 次

欢迎光临爱易网网页脚本特效中心，点击运行按钮演示特效：

以下是程序代码

<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>爱易网网页特效演示，字幕滚动效果（四）</title>
</head>

<body>

/*********************************************************************************
These are the variables you have to set:
*********************************************************************************/

//The speed of the timeout between each scroll.
timSpeed = 50

//The height of the container (change this when it scrolls to much or to little)
contHeight = 100

/*********************************************************************************
This is the object constructor function, which applies 
methods and properties to the Cross-browser layer object
*********************************************************************************/
function makeScrollObj(obj,nest){
	nest=(!nest) ? "":'document.'+nest+'.'		
	this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0;
  	this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+obj):0;		
	this.height=bw.ns4?this.css.document.height:this.el.offsetHeight
	this.top=b_gettop										
	return this
}

// A unit of measure that will be added when setting the position of a layer.
var px = bw.ns4||window.opera?"":"px";

//Getting the top for the top method
function b_gettop(){
	var gleft=(bw.ns4 || bw.ns6)?parseInt(this.css.top):eval(this.css.pixelTop);
	return gleft;
}
//Variables
var scrollTim = 1;
var active = 0;
/*********************************************************************************
The scroll function. Checks what way to scroll and checks if the
layer is not already on top or bottom.
*********************************************************************************/
function scroll(speed){
	clearTimeout(scrollTim)
	way = speed>0?1:0
	if ((!way && oScroll[active].top()>-oScroll[active].height+contHeight) || (oScroll[active].top()<0 && way)){
		oScroll[active].css.top = (oScroll[active].top()+speed)+px
		scrollTim = setTimeout("scroll("+speed+")",timSpeed)
	}
}
//Clears the timeout so the scroll stops, this is called onmouseout.
function noScroll(){
	clearTimeout(scrollTim)
}
/*********************************************************************************
Changes the active layer. Hides the one that's visible and
shows the "new" one. Also set's the new layers top to
0 so it starts at top.
***************************************************</div></div>

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