var DDSPEED = 10;
var DDTIMER = 15;

// 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.top = '-' + c.offsetHeight + 'px';
      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 cent //
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.top = parseInt(c.style.top.replace('px','')) - parseInt(dist * d) + 'px';
  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);
  }
}

	
	var activeMenuItem = new Array();
	
	function isUlInArray(inputObj,ulObj){
		while(inputObj && inputObj.id!='dhtmlgoodies_listMenu'){
			if(inputObj==ulObj)return true;
			inputObj = inputObj.parentNode;			
		}		
		return false;
	}
	
	function showHideSub(e,inputObj)
	{
		

		if(!inputObj)inputObj=this;
		var parentObj = inputObj.parentNode;
		var ul = parentObj.getElementsByTagName('UL')[0];
		if(activeMenuItem.length>0){
			for(var no=0;no<activeMenuItem.length;no++){
				if(!isUlInArray(ul,activeMenuItem[0]) && !isUlInArray(activeMenuItem[0],ul)){
					activeMenuItem[no].style.display='none';
					activeMenuItem.splice(no,1);
					no--;
				}
			}			
		}
		if(ul.offsetHeight == 0){
			ul.style.display='block';
			activeMenuItem.push(ul);
		}else{
			ul.style.display='none';
		}
	}
	
	function showHidePath(inputObj)
	{
		var startTag = inputObj;
		showHideSub(false,inputObj);
		inputObj = inputObj.parentNode;
		while(inputObj){			
			inputObj = inputObj.parentNode;
			if(inputObj.tagName=='LI')showHideSub(false,inputObj.getElementsByTagName('A')[0]);
			if(inputObj.id=='dhtmlgoodies_listMenu')inputObj=false;	
		}		
	}
	
	function initMenu()
	{
		var obj = document.getElementById('dhtmlgoodies_listMenu');
		var linkCounter=0;
		var aTags = obj.getElementsByTagName('A');
		var activeMenuItem = false;
		var activeMenuLink = false;
		var thisLocationArray = location.href.split(/\//);
		var fileNameThis = thisLocationArray[thisLocationArray.length-1];
		if(fileNameThis.indexOf('?')>0)fileNameThis = fileNameThis.substr(0,fileNameThis.indexOf('?'));
		if(fileNameThis.indexOf('#')>0)fileNameThis = fileNameThis.substr(0,fileNameThis.indexOf('#'));

		for(var no=0;no<aTags.length;no++){
			var parent = aTags[no].parentNode;
			var subs = parent.getElementsByTagName('UL');
			if(subs.length>0){
				aTags[no].onclick = showHideSub;	
				linkCounter++;
				aTags[no].id = 'aLink' + linkCounter;
			}	
			
			if(aTags[no].href.indexOf(fileNameThis)>=0 && aTags[no].href.charAt(aTags[no].href.length-1)!='#'){				
				if(aTags[no].parentNode.parentNode){								
					var parentObj = aTags[no].parentNode.parentNode.parentNode;
					var a = parentObj.getElementsByTagName('A')[0];
					if(a.id && !activeMenuLink){
						
						activeMenuLink = aTags[no];
						activeMenuItem = a.id;
					}
				}
			}		
		}		

		if(activeMenuLink){
			activeMenuLink.className='activeMenuLink';
		}
		if(activeMenuItem){
			if(document.getElementById(activeMenuItem))showHidePath(document.getElementById(activeMenuItem));	
		}
	}
	//window.onload = initMenu;