// LEFTNAV EXPAND ACTION

var dg_slideSpeed = 10;	// Higher value = faster
var dg_timer = 10;	// Lower value = faster

var objectIdToSlideDown = false;
var dg_activeId = false;
var dg_slideInProgress = false;

showHideContent = function(e,inputId)
{
	if(dg_slideInProgress)return;
	dg_slideInProgress = true;
	if(!inputId)inputId = this.id;
	inputId = inputId + '';
	var numericId = inputId.replace(/[^0-9]/g,'');
	var answerDiv = document.getElementById('dg_a' + numericId);

	objectIdToSlideDown = false;
	
	if(!answerDiv.style.display || answerDiv.style.display=='none'){		
		if(dg_activeId &&  dg_activeId!=numericId){			
			objectIdToSlideDown = numericId;
			slideContent(dg_activeId,(dg_slideSpeed*-1));
		}else{
			
			answerDiv.style.display='block';
			answerDiv.style.visibility = 'visible';
			
			slideContent(numericId,dg_slideSpeed);
		}
	}else{
		slideContent(numericId,(dg_slideSpeed*-1));
		dg_activeId = false;
	}	
}

slideContent = function(inputId,direction)
{
	
	var obj =document.getElementById('dg_a' + inputId);
	var contentObj = document.getElementById('dg_ac' + inputId);
	height = obj.clientHeight;
	if(height==0)height = obj.offsetHeight;
	height = height + direction;
	rerunFunction = true;
	if(height>contentObj.offsetHeight){
		height = contentObj.offsetHeight;
		rerunFunction = false;
	}
	if(height<=1){
		height = 1;
		rerunFunction = false;
	}

	obj.style.height = height + 'px';
	var topPos = height - contentObj.offsetHeight;
	if(topPos>0)topPos=0;
	contentObj.style.top = topPos + 'px';
	if(rerunFunction){
		setTimeout('slideContent(' + inputId + ',' + direction + ')',dg_timer);
	}else{
		if(height<=1){
			obj.style.display='none'; 
			if(objectIdToSlideDown && objectIdToSlideDown!=inputId){
				document.getElementById('dg_a' + objectIdToSlideDown).style.display='block';
				document.getElementById('dg_a' + objectIdToSlideDown).style.visibility='visible';
				slideContent(objectIdToSlideDown,dg_slideSpeed);				
			}else{
				dg_slideInProgress = false;
			}
		}else{
			dg_activeId = inputId;
			dg_slideInProgress = false;
		}
	}
}

initShowHideDivs = function()
{
	var divs = document.getElementsByTagName('DIV');
	var divCounter = 1;
	for(var no=0;no<divs.length;no++){
		if(divs[no].className=='expand_menu'){
			divs[no].onclick = showHideContent;
			divs[no].id = 'dg_q'+divCounter;
			var answer = divs[no].nextSibling;
			while(answer && answer.tagName!='DIV'){
				answer = answer.nextSibling;
			}
			answer.id = 'dg_a'+divCounter;	
			contentDiv = answer.getElementsByTagName('DIV')[0];
			contentDiv.style.top = 0 - contentDiv.offsetHeight + 'px'; 	
			contentDiv.className='child_menu_content';
			contentDiv.id = 'dg_ac' + divCounter;
			answer.style.display='none';
			answer.style.height='1px';
			divCounter++;
		}		
	}	
}

activateMenu = function() {
    /* currentStyle restricts the Javascript to IE only */
	if (document.all && document.getElementById('nav').currentStyle) {  
      
        var navroot = document.getElementById('nav');
        
        /* Get all the list items within the menu */
        var lis=navroot.getElementsByTagName("LI");  
        for (i=0; i<lis.length; i++) {
                       
           /* If the LI has another menu level */
            if(lis[i].lastChild.tagName=="UL"){
                
                /* assign the function to the LI */
             	lis[i].onmouseover=function() {
            	   this.className+=" over";
                }
                lis[i].onmouseout=function() {
                   this.className=this.className.replace(" over", "");
                }
            }
        } 
    } 
    
    var nav = document.getElementById('nav');
    nav.style.display = "block";    
    
    if ( document.getElementById('leftnav') ) {
        var leftnav = document.getElementById('leftnav');   
        var lns=leftnav.getElementsByTagName("LI");
    
        for (i=0; i<lns.length; i++) {
            if (lns[i].firstChild.className == "has_children") {
              //Hide embedded ULS 
                lns[i].innerHTML = '<div class="expand_menu"><span>+</span></div>'+
                                   '<a href="'+lns[i].childNodes[0].href+'" class="has_children">'+ lns[i].childNodes[0].innerHTML + '</a>'+ 
                                   '<div class="child_menu"><div><ul class="clearfix">'+ 
                                   lns[i].childNodes[2].innerHTML + 
                                   '</ul></div></div>';
            }
        } 
        initShowHideDivs();
    }
}

addLoadListener(activateMenu);


//addLoadListener(initShowHideDivs);
//showHideContent(true,1);	// Automatically expand first item