var DDSPEED = 10;
var DDTIMER = 15;
var OFFSET = -2;
var ZINT = 100;

function ddMenu(id,d){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  if(c) {
  	clearInterval(c.timer);
  
	  if(d == 1){
	    clearTimeout(h.timer);
	    c.style.display = 'block';
	    if(c.maxh && c.maxh <= c.offsetHeight){return}
	    else if(!c.maxh){
	      c.style.left = (h.offsetWidth + OFFSET) + 'px';
	      c.style.height = 'auto';
	      c.maxh = c.offsetHeight;
	      c.style.height = '0px';
	    }
	    ZINT = ZINT + 1;
	    c.style.zIndex = ZINT;
	    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
	  }else{
	    h.timer = setTimeout(function(){ddCollapse(c)},50);
	  }
	}
}

function ddCollapse(c){
  c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);
}

function cancelHide(id){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  clearTimeout(h.timer);
  clearInterval(c.timer);
  if(c.offsetHeight < c.maxh){
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }
}

function ddSlide(c,d){
  var currh = c.offsetHeight;
  var dist;
  if(d == 1){
    dist = Math.round((c.maxh - currh) / DDSPEED);
  }else{
    dist = Math.round(currh / DDSPEED);
  }
  if(dist <= 1 && d == 1){
    dist = 1;
  }
  c.style.height = currh + (dist * d) + 'px';
  c.style.opacity = currh / c.maxh;
  c.style.filter = 'alpha(opacity=' + (currh * 100 / c.maxh) + ')';
  if(currh > (c.maxh - 2) && d == 1){
    clearInterval(c.timer);
  }else if(dist < 1 && d != 1){
    clearInterval(c.timer);
    c.style.display = 'none';
  }
}


	productsOn = new Image();
	productsOff = new Image();
	servicesOn = new Image();
	servicesOff = new Image();
	mistakeOn = new Image();
	mistakeOff = new Image();
	aboutOn = new Image();
	aboutOff = new Image();
	contactOn = new Image();
	contactOff = new Image();
	backToProductsOn = new Image();
	backToProductsOff = new Image();
	backToServicesOn = new Image();
	backToServicesOff = new Image();

	productsOn.src = "./newimages/products_on.jpg";
	productsOff.src = "./newimages/products_off.jpg";
	servicesOn.src = "./newimages/services_on.jpg";
	servicesOff.src = "./newimages/services_off.jpg";
	mistakeOn.src = "./newimages/Mistake_On.jpg";
	mistakeOff.src = "./newimages/Mistake.jpg";
	aboutOn.src = "./newimages/About_On.jpg";
	aboutOff.src = "./newimages/About.jpg";
	contactOn.src = "./newimages/Contact_On.jpg";
	contactOff.src = "./newimages/Contact.jpg";
	backToProductsOn.src = "./newimages/back_to_products_on.jpg";
	backToProductsOff.src = "./newimages/back_to_products_off.jpg";
	backToServicesOn.src = "./newimages/back_to_services_on.jpg";
	backToServicesOff.src = "./newimages/back_to_services_off.jpg";