function menuFix() {
  var sfEls = document.getElementById("nav").getElementsByTagName("li");
  
  for (var i=0; i<sfEls.length; i++) {
    sfEls[i].onmouseover=function() {
      this.className+=(this.className.length>0? " ": "") + "show";
    }
    sfEls[i].onmouseout=function() {
      this.className=this.className.replace(new RegExp("( ?|^)show\\b"), "");
    }
  }
}
window.onload=menuFix;


function setTab(name,cursel,n){
 for(i=1;i<=n;i++){
  var menu=document.getElementById(name+i);
  var con=document.getElementById("con_"+name+"_"+i);
  menu.className=i==cursel?"cur":"";
  con.style.display=i==cursel?"block":"none";
 }
}