function $(element) {
    return document.getElementById(element);
}
//切屏--是按钮，_v是内容平台，_h是内容库
function reg(str){
  var bt=$(str+"_b").getElementsByTagName("h2");
  for(var i=0;i<bt.length;i++){
    bt[i].subj=str;
    bt[i].pai=i;
    bt[i].style.cursor="pointer";
    bt[i].onclick=function(){
      $(this.subj+"_v").innerHTML=$(this.subj+"_h").getElementsByTagName("blockquote")[this.pai].innerHTML;
      for(var j=0;j<$(this.subj+"_b").getElementsByTagName("h2").length;j++){
        var _bt=$(this.subj+"_b").getElementsByTagName("h2")[j];
        var ison=j==this.pai;
        _bt.className=(ison?"":"h2bg");
      }
    }
  }
  $(str+"_h").className="none";
  $(str+"_v").innerHTML=$(str+"_h").getElementsByTagName("blockquote")[0].innerHTML;
}
function showMenu(menuID,index) {
    $(menuID).style.display=(index==0?"none":"block");
}

//商品详情
function picturs(){
    var goodsimg = document.getElementById("goodsimg");
    var imglist = document.getElementById("imglist");
    var imgnum = imglist.getElementsByTagName("img");
    for(var i = 0; i<imgnum.length; i++){
        imgnum[i].onclick=function(){
            var lang = this.getAttribute("lang");
            goodsimg.setAttribute("src",lang);
            for(var j=0; j<imgnum.length; j++){
                if(imgnum[j].getAttribute("class") =="onbg" || imgnum[j].getAttribute("className") =="onbg"){
                    imgnum[j].className = "autobg";
                    break;
                }
            }
            this.className = "onbg";
        }
    }
}

//判断一个容器的时间高度以解决ie6下绝对定位偏差问题
function divheight(id){
    var divh = $(id);
    var number1 = divh.scrollHeight;
    if( (number1 % 2) !== 0){divh.style.height = number1+1+'px'}
}