// logo滚动
var marquee = function(){
	var imgs = 20; //图像个数
	var imgW = 142; //单个图像宽度
	var playsW = 750; // 总显示框宽度
	var scollW = imgs * imgW - playsW; //滚动宽度
	var num = 0; // 记数
	
	var playsId = document.getElementById("playsId");
	var listId = document.getElementById("listId");
	
	if( (playsId || listId) == null) return;

	var plays = function () {
		if(num <= scollW){
			listId.style.marginLeft = -num + "px";
			num ++;
			setTimeout(plays, 50);
		}else{
			listId.style.marginLeft  = num = 0;
			plays();
			return;
		}
	}
	plays();
}
window.onload=function(){
	marquee();	
}