function getElementPosition(elemID) {
	var elm = document.getElementById(elemID);
	var offsetLeft = 0;
	var offsetTop = 0;
	while(elm){
		offsetLeft += elm.offsetLeft;
		offsetTop += elm.offsetTop;
		elm = elm.offsetParent;
	}
	return {left:offsetLeft, top:offsetTop};
}

function vote(article, num)
	{
		new Ajax.Updater('vote_result', '/php/vote.php',
		{
			method:'get',
			parameters: {article:article, rate:num}
		});
	}

function show_news(direction, current_id, by_user)
	{
		new Ajax.Updater('news', '/php/news_block.php',
		{
			method:'get',
			parameters: {direction:direction, current_id:current_id, by_user:by_user}
		});
	}

function hideAllMenu(){
	arrDivs = document.getElementsByTagName("div");
	for(i=0;i<arrDivs.length;i++){
		if(arrDivs[i].className=='sub_menu_frame'){
			arrDivs[i].style.display = 'none';
		}
	}
}

function showMenu(elemID, moveLeft) {
	hideAllMenu();
	var sMenu = document.getElementById("menuFrame"+elemID.substring(7, 8));
	var offsetData = getElementPosition(elemID);
	sMenu.style.top = offsetData['top']+20;
	sMenu.style.left = offsetData['left'] - 1 - moveLeft;
	sMenu.style.display = 'block';
}



var DDSPEED = 10;
var DDTIMER = 15;

// main function to handle the mouse events //
function ddMenu(id,d,leftOffset){
  var h = document.getElementById('topMenu'+id);
  var c = document.getElementById('menuFrame'+id);

	var offsetData = getElementPosition('topMenu'+id);
	var sMenu = document.getElementById('menuFrame'+id);
	sMenu.style.top = (offsetData['top']+20) + 'px';
	sMenu.style.left = (offsetData['left'] - (1 + leftOffset)) + 'px';

  clearInterval(c.timer);
  if(d == 1){
    clearTimeout(h.timer);
    if(c.maxh && c.maxh <= c.offsetHeight){return}
    else if(!c.maxh){
      c.style.display = 'block';
      c.style.height = 'auto';
      c.maxh = c.offsetHeight;
      c.style.height = '0px';
    }
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }else{
    h.timer = setTimeout(function(){ddCollapse(c)},50);
  }
}

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

// cancel the collapse if a user rolls over the dropdown //
function cancelHide(id){
  var h = document.getElementById('topMenu'+id);
  var c = document.getElementById('menuFrame'+id);
  clearTimeout(h.timer);
  clearInterval(c.timer);
  if(c.offsetHeight < c.maxh){
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }
}

// incrementally expand/contract the dropdown and change the opacity //
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 < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
    clearInterval(c.timer);
  }
}


// Tabbed control functions

function show_winbytab(id){
	for(i=0;i<4;i++){
		var objTab = document.getElementById('win'+i);
		if(i==id){
			objTab.style.display = 'block';
		}else{
			objTab.style.display = 'none';
		}
	}
}
	
function set_active(id){
	for(i=0;i<4;i++){
		var objTh = document.getElementById('tab'+i);
		if(i==id){
			objTh.className = objTh.className.replace(/tabUnsel/, 'tabSel');
		}else{
			objTh.className = objTh.className.replace(/tabSel/, 'tabUnsel');
		}
	}
	show_winbytab(id);
}

function check_form (){
		if(document.FeedBack.fname.value==''){
			alert("Укажите имя");
			return(false);
		}
		if(document.FeedBack.lname.value==''){
			alert("Укажите фамилию");
			return(false);
		}
		if(document.FeedBack.company.value==''){
			alert("Укажите название компании");
			return(false);
		}
		if(document.FeedBack.phone.value==''){
			alert("Укажите телефон");
			return(false);
		}
		if(document.FeedBack.email.value==''){
			alert("Укажите E-Mail");
			return(false);
		}
		return(true);
}