js 实现无缝滚动 兼容IE和FF_javascript技巧

// JavaScript Document

/*****
@author leaves chen (leaves615@gmail.com)
@copyright 2009
*****/
var pause=false;
var scrollTimeId=null;
var container=null;
var lineHeight=null;
var speed=0;
var delay=0;
simpleScroll=function(container1,lineHeight1,speed1,delay1){
    container=document.getElementById(container1);
    lineHeight=lineHeight1;
    speed=speed1;
    delay=delay1;
    //滚动效果
    scrollexc=function(){
        if(pause) return ;
        container.scrollTop+=2;
        var lh=lineHeight||container.getElementsByTagName('li')[0].offsetHeight;
        if(container.scrollTop%lh            clearInterval(scrollTimeId);
            fire();
            container.scrollTop=0;
            setTimeout(start,delay*1000);
        }
    };
    //开始滚动
    start=function(){
        var lh=lineHeight||container.getElementsByTagName('li')[0].offsetHeight;
            if (container.scrollHeight - container.offsetHeight >= lh)
                scrollTimeId = setInterval(scrollexc, speed);
    };
    //把子节点树中的第一个移动到最后
    fire=function(){
        container.appendChild(container.getElementsByTagName('li')[0]);
    };
    container.onmouseover=function(){pause=true;};
    container.onmouseout=function(){pause=false;};
    setTimeout(start,delay*1000);
};