function $11(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=$11(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].onmouseover = function () {//或者onmouseover
    $11(this.subj + "_v").innerHTML = $11(this.subj + "_h").getElementsByTagName("blockquote")[this.pai].innerHTML;
    for (var j = 0; j < $11(this.subj + "_b").getElementsByTagName("h2").length; j++) {
        var _bt = $11(this.subj + "_b").getElementsByTagName("h2")[j];
        var ison=j==this.pai;
        _bt.className = (ison ? "" : "h2bg_1");
      }
    }
  }
  $11(str + "_h").className = "none";
  $11(str + "_v").innerHTML = $11(str + "_h").getElementsByTagName("blockquote")[0].innerHTML;
}