var DDSPEED = 3;
var DDTIMER = 3;

// 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 munge_current_directory(x,y,z){
var dirs=window.location.href.split('/');
var cdir="";
for (i = 3+z;i<dirs.length-1;i++)
{
	cdir = cdir + dirs[i]+'/';
	//console.debug("%i %s %s", i,cdir, dirs[i]);
}
var output = x.replace("%1", y+cdir);
document.write(output);
//console.debug("%s %s %s",y,cdir,output);
}

function delete_subdirectory(x,y,z){
var dirs=window.location.href.split('/');
var cdir="";
for (i = 3;i<dirs.length-1;i++)
{
	if (dirs[i] != y)
	cdir = cdir + dirs[i]+'/';
	
	//console.debug("%i %s %s", i,cdir, dirs[i]);
}
var output = x.replace("%1", "/"+cdir);
document.write(output);
//console.debug("%s %s %s",y,cdir,output);
}


function dropdown_chooser(x){
var dirs=window.location.href.split('/');
var drop = 0;
for (i = 3;i<dirs.length-1;i++)
{
	if (dirs[i] == x) drop = 1;
}
	
	if (drop == 1)
	   document.write('<dl class="dropdown-s">');
	   else 
	   document.write('<dl class="dropdown">');
}