function sub(id){
        obj = document.getElementById("sub_"+ id);

        obj.style.display = (obj.style.display == "block") ? "none" : "block";
}


function slide_in(id) {
       var obj = document.getElementById("menu_"+ id);
       if(parseInt(obj.style.height) > 3){
               obj.style.height = (parseInt(obj.style.height) - 5) +"px";
               setTimeout("slide_in('"+ id +"')", 1);
       }
       else{
               if(document.getElementById("price_"+ id)){
                       var obj = document.getElementById("price_"+ id);
               }
               else{
                       var obj = document.getElementById("content_"+ id);
               }
               obj.style.display = "none";
       }
}

function slide_out(id) {
       var obj = document.getElementById("menu_"+ id);
       obj.style.display = "block";

       var totalHeight = obj.getElementsByTagName("span")[0].offsetHeight-3;
       if(totalHeight > parseInt(obj.offsetHeight)){
               obj.style.height = (parseInt(obj.style.height) + 5) +"px";
               setTimeout("slide_out('"+ id +"')", 1);
       }
}