var DDSPEED = 7;
var DDTIMER = 15;
var openstate01 = 0;
var openstate02 = 0;
var openstate03 = 0;



// close menus if open //

function closeMenu(){
	
	if(openstate01 == 1){
		menustateone();
		}
	
	else if(openstate02 == 1){
		menustatetwo();
		}
		
	else if(openstate03 == 1){
		menustatethree();
		}
	
}	

	

// open close ONE and close others //
function menustateone(){
    if(openstate01 == 0 && openstate02 == 0 && openstate03 == 0){
    ddMenu('one',1);
    openstate01 = 1;
    $("#button1").text('-');
    }
    
    else if(openstate01 == 0 && openstate02 == 1 && openstate03 == 0){
    ddMenu('one',1);
    openstate01 = 1;
    $("#button1").text('-');
    
    menustatetwo();
    }
    
    else if(openstate01 == 0 && openstate02 == 0 && openstate03 == 1){
    ddMenu('one',1);
    openstate01 = 1;
    $("#button1").text('-');
    
    menustatethree();
    }
    
    else{
    ddMenu('one',-1);
    openstate01 = 0;
    $("#button1").text('+');

    }
}

// open close TWO and close others //
function menustatetwo(){
    if(openstate02 == 0 && openstate01 == 0 && openstate03 == 0){
    ddMenu('two',1);
    openstate02 = 1;
    $("#button2").text('-');
    }
    
    else if(openstate01 == 1 && openstate02 == 0 && openstate03 == 0){
    ddMenu('two',1);
    openstate02 = 1;
    $("#button2").text('-');
    
    menustateone();
    }
    
    else if(openstate01 == 0 && openstate02 == 0 && openstate03 == 1){
    ddMenu('two',1);
    openstate02 = 1;
    $("#button2").text('-');
    
    menustatethree();
    }
    
    else{
    ddMenu('two',-1);
    openstate02 = 0;
    $("#button2").text('+');

    }
}

// open close THREE  and close others //
function menustatethree(){
    if(openstate03 == 0 && openstate01 == 0 && openstate02 == 0){
    ddMenu('three',1);
    openstate03 = 1;
    $("#button3").text('-');

    }
    
    else if(openstate01 == 0 && openstate02 == 1 && openstate03 == 0){
    ddMenu('three',1);
    openstate03 = 1;
    $("#button3").text('-');
    
    menustatetwo();
    }
    
    else if(openstate01 == 1 && openstate02 == 0 && openstate03 == 0){
    ddMenu('three',1);
    openstate03 = 1;
    $("#button3").text('-');
    
    menustateone();
    }
    
    else{
    ddMenu('three',-1);
    openstate03 = 0;
    $("#button3").text('+');

    }
}


// main function to handle the mouse events //
function ddMenu(id,d){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  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(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);
  }
}

// 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);
  }
}



function hideMenus()
{
    var uls = document.getElementsByTagName('dd'), i;
    for (i = 0; i < uls.length; i++)
    {
        if (uls[i].className === 'dropdown' && uls[i].style.display !== 'none')
        {
            uls[i].style.display = 'none';
        }
    }
}