var DDSPEED = 10;
var DDTIMER = 15;

// main function to handle the mouse events //
function ddMenu(id,d){
  var c = document.getElementById(id);
  clearInterval(c.timer);
  if(d == 1){
	c.style.visibility="visible";
  }
  else{
	c.style.visibility="hidden";
  }
}