var scrollStart = 0;

function nextItem() {
	if (scrollStart == 0)
		new Effect.Move ($('rel_projects'),{ x: -397, y: 0, mode: 'relative', afterFinish: stopScroll, beforeStart: startScroll});
}

function prevItem() {
	if (scrollStart == 0)
		new Effect.Move ($('rel_projects'),{ x: 397, y: 0, mode: 'relative', afterFinish: stopScroll, beforeStart: startScroll });
}

function startScroll() {
	scrollStart = 1;
}

function stopScroll() {
	scrollStart = 0;
}

function toggleClass(id){
   if ($('blok_' + id).className == 'blok_item_active') {
     $('blok_' + id).className = 'blok_item';
	 $(id).style.display = 'none';
   } else {
     $('blok_' + id).className = 'blok_item_active';
	 $(id).style.display = 'block';
   }
}

function toggleClassMenu(id){
   if ($('blok_' + id).className == 'blok_item_active2') {
     $('blok_' + id).className = 'blok_item2';
    $(id).style.display = 'none';
   } else {
     $('blok_' + id).className = 'blok_item_active2';
    $(id).style.display = 'block';
   }
}

function toggleClassMenuHome(id){
   if ($('blok_' + id).className == 'blok_item_active_home') {
     $('blok_' + id).className = 'blok_item_home';
    $(id).style.display = 'none';
   } else {
     $('blok_' + id).className = 'blok_item_active_home';
    $(id).style.display = 'block';
   }
}