function showsubmenu(sid,total){
   var i=total;
   whichEl = eval("leftnav" + sid);
   if (whichEl.style.display == "none"){
        for(var j=1;j<=i;j++){   
        	if(sid==j){
           		eval("leftnav" + sid + ".style.display=\"\";");
			}else{
	       		eval("leftnav" + j + ".style.display=\"none\";");
			}
        }
   }else{   
    eval("leftnav" + sid + ".style.display=\"none\";");
   }
}