var show = (navigator.userAgent && navigator.userAgent.indexOf("Gecko/") != -1) ? "table-row" : "block";

function fold_open(n){
 elms = document.getElementsByTagName("table");
 for(var i=0;i<elms.length;i++){
   if(elms[i].className == "fold_"+n){
     if(elms[i].style["display"] == "none")
       elms[i].style["display"] = show;
     else
       elms[i].style["display"] = "none";
   }
 }
}

function fold_openall(n){
 elms = document.getElementsByTagName("table");
 for(var j=1;n+1>j;j++){
   for(var i=0;i<elms.length;i++){
     if(elms[i].className == "fold_"+j){
         elms[i].style["display"] = show;
     }
   }
 }
}

function fold_closeall(n){
 elms = document.getElementsByTagName("table");
 for(var j=1;n+1>j;j++){
   for(var i=0;i<elms.length;i++){
     if(elms[i].className == "fold_"+j){
         elms[i].style["display"] = "none";
     }
   }
 }
}