// JavaScript Document
//图片自适应某高宽,imgA为当前图片，widthStr,heightStr为图片所在box的宽高
   function setImgWH(imgA,widthStr,heightStr){
	  var img = new Image();
	  var kuan = imgA.width - widthStr;
	  var gao = imgA.height - heightStr;
	  if (kuan <= 0 && gao <= 0){
		  imgA.width = imgA.width;
		  imgA.height = imgA.height;
		  }else{
	 		 if (kuan > gao){
		  			imgA.width = widthStr;
		  			imgA.height = imgA.height-(kuan/imgA.width*imgA.height)
		  		}
	  		if (kuan < gao){
		  			imgA.width = imgA.width-(gao/imgA.height*imgA.width);
		  			imgA.height = heightStr;
		 		}
		  }
	  }
	 
//选项卡
function changeStyle(id,len,obj,class2,class1){
	for (var i = 1; i <= len; i++){
		if (i == id){
			document.getElementById(obj+i).className = class2;
			}else{
			document.getElementById(obj+i).className = class1;
			}
		}
	}

//showlayer
function showLayer(layer,class1){
		document.getElementById(layer).className = class1;
	}


//单行文本上翻滚
var Marquee_h=20
var speed=10
var wait_time=1800
var timer;
function Marqueeup() {
    var obj = document.getElementById("Marqueeobj");
    var stoprun = false;
    obj.onmouseover = function() { stoprun = true; }
    obj.onmouseout = function() { stoprun = false; }
    function start() {
       timer = setInterval(scrolling, speed);
       if (!stoprun) obj.scrollTop++;
    }
    function scrolling() {
       if ((obj.scrollTop % Marquee_h) != 0) {
           obj.scrollTop++;
           if (obj.scrollTop >= obj.scrollHeight - Marquee_h - 1) obj.scrollTop = 0;
       }
       else {
           clearInterval(timer);
           setTimeout(start, wait_time);
       }
    }
    setTimeout(start, wait_time);
}