var timer;           //定时器变量
var amount = 2;      //速度变量，默认值为2
var stoped = false;
function initMarquee(marId){
	if(document.getElementById(marId)){
		if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 3)){		
		   document.getElementById(marId).scrollAmount=document.getElementById(marId).clientWidth;
		 }
		 else{
		   document.getElementById(marId).scrollAmount=amount;
		 }		 
	}
}
/**
 * 开始函数，同时清除定时器
 * marId marquee对象的id
 */		
function startMarquee(marId){
    var marObj = document.getElementById(marId);
    marObj.scrollAmount = amount;
    marObj.start(); 
    clearTimeout(timer);  
    stoped = true;
    marObj.onscroll=function(){scrolling(this);};
}
/**
 * 滚动函数
 * 把初始速度设定到最大，使得marquee框里开始就充满部分数据，
 * 然后将初始状态保持特定时间后再开始滚动
 * marObj marquee对象
 * waitTime 初始状态保持时间
 */		
function scrollMarquee(marObj, waitTime){	
	if(!stoped && marObj.scrollLeft <= marObj.clientWidth){
	   marObj.stop();	     
	   timer = setTimeout("startMarquee('"+marObj.id+"')", waitTime);
	}
}
function scrolling(marObj){	 
	marObj.stop();
	marObj.scrollAmount = amount;
	marObj.start();
 
}


function slideLine(ul, delay, speed, lh) {
var slideBox = (typeof ul == 'string')?document.getElementById(ul):ul;
var delay = delay||1000, speed=speed||20, lh = lh||20;
var tid = null, pause = false;
var start = function() {
tid=setInterval(slide, speed);
}
var slide = function() {
if (pause) return;
slideBox.scrollTop += 2;
if (slideBox.scrollTop % lh == 0) {
clearInterval(tid);
slideBox.appendChild(slideBox.getElementsByTagName('li')[0]);
slideBox.scrollTop = 0;
setTimeout(start, delay);
}
}
slideBox.onmouseover=function(){pause=true;}
slideBox.onmouseout=function(){pause=false;}
setTimeout(start, delay);
}