navHover = function() {
  var lis = document.getElementById("navmenu").getElementsByTagName("LI");
  for (var i=0; i<lis.length; i++) {
    lis[i].onmouseover=function() {
      this.className+=" iehover";
    }
    lis[i].onmouseout=function() {
      this.className=this.className.replace(new RegExp(" iehover\\b"), "");
    }
  }
}
if (window.attachEvent) window.attachEvent("onload", navHover);
//**根据传入的参数设置菜单头的选中色*****
//@parme  idx: 选中的ID号
//@parme  type: 1.代表选中的样式为 cardnav1 非1代表选中的样式为 cardnav2
   function selectCL(idx, type)
   { 
      var arrNav = document.getElementsByName("cardnav"); 
      if(arrNav){
         arrNav[0].className = "cardnav1";
         for(var i=1; i< arrNav.length; i++){
           arrNav[i].className = "cardnav2";
          }
      }
      if(idx){
          if(type == 1){
             document.getElementById(idx).className = "cardnav1 cardnav_li_currently";
          }else{
             document.getElementById(idx).className = "cardnav2 cardnav_li_currently";
          } 
      }
   }