var galleryWidth = 504;

function showPic(whichpic) {
 if (document.getElementById) {
  document.getElementById('placeholder').src = whichpic.href;
  if (whichpic.title) {
   document.getElementById('desc').childNodes[0].nodeValue = whichpic.title;
  } else {
   document.getElementById('desc').childNodes[0].nodeValue = whichpic.childNodes[0].nodeValue;
  }
  return false;
 } else {
  return true;
 }
}

function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    } else {
        window.onload = function() {
            oldonload();
            func();
        }
    }
}

function moveSlideshow(elementID,final_x,final_y,interval) {
    if (!document.getElementById) return false;
    
    // if the element does not exist we have nothing to do
    if (!document.getElementById(elementID)) return false;
    var elem = document.getElementById(elementID);
    
    // the slideshow events stack up and the animation is not smooth anymore
    if (elem.movement) {
        clearTimeout(elem.movement);
    }
    
    // current slideshow position
    var xpos = parseInt(elem.style.left);
    var ypos = parseInt(elem.style.top);
    if (xpos == final_x && ypos == final_y) {
        return true;
    }
    
    // restrict moving to white area
    if (final_x <= -elem.max_x) {
        final_x = -elem.max_x;
    }
    if (final_x > 0) {
	    final_x = 0;
    }
    
    // animation bit (taken from the book DOM Scripting by Jeremy Keith)
    if (xpos < final_x) {
        var dist = Math.ceil((final_x - xpos)/10);
        xpos = xpos + dist;
    }
    if (xpos > final_x) {
        var dist = Math.ceil((xpos - final_x)/10);
        xpos = xpos - dist;
    }
  
    // again, restrict showing white area
    if (xpos <= -elem.max_x) {
	    xpos = -elem.max_x;
    }
    if (xpos > 0) {
	    xpos = 0;
    }
    
    // fix the elements position
    elem.style.left = xpos + "px";
    elem.style.top = ypos + "px";
    
    // and set up the event again after an interval
    var repeat = "moveSlideshow('"+elementID+"',"+final_x+","+final_y+","+interval+")";
    elem.movement = setTimeout(repeat,interval);
}

function prepareSlideshow() {
	// first lets make sure the browser understands the DOM methods we will be using
  	if (!document.getElementsByTagName) return false;
  	if (!document.getElementById) return false;
  	
	// Make sure the elements exist
  	if (!document.getElementById("slideshow")) return false;
  	var slideshow = document.getElementById("slideshow");
  	var wrapper = document.getElementById("slideshow_wrapper");
  	wrapper.style.overflow = "hidden";
  	
  	// prepare the navigation bit we will be using
  	// left
  	var navigation = document.createElement("ul");
  	navigation.setAttribute("id", "navigation");
  	var li = document.createElement("li");
  	var scroll_left = document.createElement("a");
  	scroll_left.setAttribute("id", "scroll_left");
  	scroll_left.href ="#";
  	var text = document.createTextNode("Left");
  	scroll_left.appendChild(text);
  	li.appendChild(scroll_left);
  	navigation.appendChild(li);
  	slideshow.insertBefore(navigation, wrapper);
  	
  	//right
  	var li = document.createElement("li");
  	var scroll_right = document.createElement("a");
  	scroll_right.setAttribute("id", "scroll_right");
  	scroll_right.href ="#";
  	var text = document.createTextNode("Right");
  	scroll_right.appendChild(text);
  	li.appendChild(scroll_right);
  	navigation.appendChild(li);
  	slideshow.insertBefore(navigation, wrapper);
	
	var slideshow_set = document.getElementById("slideshow_set");
	slideshow_set.style.top = 0+"px";
	slideshow_set.style.left = 0+"px";
	
	// to get the max y position of the gallery image track we need to count all
	// the li items and multiply that number with 120 (width of image)
	var li = slideshow_set.getElementsByTagName("li");
	slideshow_set.max_x = (li.length-1) * 126;
	slideshow_set.max_y = li.length * 120;
	
	// need the width of the gallery so that they do not scroll vertical
	var width = li.length * galleryWidth;
	slideshow_set.style.width = width + "px";
	
	// Attach onmouseover event for left
  	scroll_left.onclick = function() {
		// get the current position of the gallery element
		var slideshow_set = document.getElementById("slideshow_set");
		var x = parseInt(slideshow_set.style.left);
		var r = x % galleryWidth;
		if (x % galleryWidth == 0) {
    		moveSlideshow("slideshow_set",x+galleryWidth,0,10);
			return false;
		}
		else{
			moveSlideshow("slideshow_set",x+(galleryWidth-r),0,10);
			return false;
		}
		return false;
	}
	
	// Attach onmouseover event for right
  	scroll_right.onclick = function() {
		// get the current position of the gallery element
		var slideshow_set = document.getElementById("slideshow_set");
		var x = parseInt(slideshow_set.style.left);
		var r = x % galleryWidth;
    	if (r == 0) {
			
    		moveSlideshow("slideshow_set",x-galleryWidth,0,10);
			/*alert(x+", "+r);*/
			return false;
		}
		else {			
			moveSlideshow("slideshow_set",x-(galleryWidth-r),0,10);
			return false;
		}
		return false;
	}
}
addLoadEvent(prepareSlideshow);

function changeMeetingType()
{
    skypeObj = document.getElementById("skypeId");
    phoneObj = document.getElementById("phonediv");
    
    //First default all to invisible
    skypeObj.style.display = "none";
    phoneObj.style.display = "none";
    
    
    ddlObj = document.getElementById("ctl00_MainPlaceHolder_ddlMeetingType");
    var choice = ddlObj.options[ddlObj.selectedIndex].value;

    if (choice == "skype")
    {
        skypeObj.style.display = "block";
    }
    else if (choice == "phone")
    {
        phoneObj.style.display = "block";
    }    
}