function switchObjClass(obj, sClassName) {
	if(obj && sClassName) {
		obj.className = sClassName;
	}
}

x = 0;
xTarget = 0;
currentImage = "";
currentSection = null;
currentSubSection = null;
move_timeout = null;
scrolling = false;
donext=true;

prevImage = null;
nextImage = null;
loadQueue = new Array();

function move() {

	scrolling = true;

	var xDiff = xTarget - x;
	x += xDiff/4;
	document.getElementById("images").style.left = x + "px";
	
	if (Math.round(xDiff) == 0) {
	
		window.clearTimeout(move_timeout);
		move_timeout = null;
		scrolling = false;
		
		
	} else {
	
		move_timeout = window.setTimeout("move();",25);
		
	}
	
}

function scrollTo(e,last) {
	// if e is null scroll to current image
	if(donext) {
  	if((e==null)||(e.id!=currentImage)) {
    	if (e == null) {
    		e = document.getElementById(currentImage);
    	}
     	var n = parseInt(e.className);
     	xTarget = -widths_array[n] + ((document.body.offsetWidth/2) - (e.getAttribute("width")/2));
     	move();
     	show(e);
  	}
   	if(last) {
   	  donext=false;
   	}
	}
	else {
	  donext=true;
	}
}

function show(e) {

	// hide current image
 	document.getElementById('i'+currentImage).style.display='none';
 	document.getElementById('c'+currentImage).style.display='none';
 	//if(currentImage=="i_last") {
 	  document.getElementById('b'+currentImage).style.opacity = 0.1;
   	document.getElementById('b'+currentImage).style.filter = "alpha(opacity=10);";
 	//}
 	//swap arrows
 	ca=document.getElementById('ca'+currentImage);
 	if(ca) {
 	  ca.style.display='none';
 	}
  cb=document.getElementById('cb'+currentImage);
  if(cb) {
    cb.style.display='none';
  }

  bi=document.getElementById('b'+currentImage);
  //bi.style.background="url(images/x.gif)";
  document.getElementById('r'+currentImage).className='imgborder';
 	//bi.style.opacity = 0.3;
 	//bi.style.filter = "alpha(opacity=30);";

	var temp = e.id.split("_");
 	// show image
 	//document.getElementById('b'+e.id).style.background= "url(i/" + temp[1] + ".jpg)";
 	document.getElementById('b'+e.id).style.opacity = 1;
 	document.getElementById('b'+e.id).style.filter = "alpha(opacity=100);";
 	document.getElementById('r'+e.id).className= "";

 	currentSection = temp[0];
 	currentSubSection = null;
		
	var prevID = parseInt(e.className) - 1;
	if (prevID >= 0) {
		prevImage = document.getElementById(images_array[prevID]);
		prevImage.onmousemove = function() {
			rollOver(this);
		}
	}
	
	var nextID = parseInt(e.className) + 1;
	if (nextID < images_array.length) {
		nextImage = document.getElementById(images_array[nextID]);
		nextImage.onmousemove = function() {
			rollOver(this);
		}
	}

	//
	currentImage = e.id;
 	ca=document.getElementById('ca'+currentImage);
 	if(ca) {
 	  ca.style.display='inline';
 	}
  cb=document.getElementById('cb'+currentImage);
  if(cb) {
    cb.style.display='inline';
  }
  document.getElementById('c'+e.id).style.display='block';
}

function rollOver(e) {
	if (prevImage != null) prevImage.onmousemove = null;
	if (nextImage != null) nextImage.onmousemove = null;
	
	if (e.id == currentImage || scrolling == true) {
 	  if (e.id == currentImage) {
 	    if(e.id=='i_last') {
 	    }
 	    else {
      document.getElementById('i'+e.id).style.display='block';
     	document.getElementById('b'+e.id).style.opacity = 0.1;
     	document.getElementById('b'+e.id).style.filter = "alpha(opacity=10);";
     	}
    }
		var n = parseInt(e.className);
		var currentN = parseInt(document.getElementById(currentImage).className);
		if ( n != (currentN - 1) && n != (currentN + 1)) {
			return false;
		}
	}
	
	document.getElementById('b'+e.id).style.opacity = 0.1;
	document.getElementById('b'+e.id).style.filter = "alpha(opacity=10);";
	
	// hide current section titles
	//document.getElementById("title_"+currentSection).style.display = "none";
	//if (currentSubSection != null) document.getElementById("title_"+currentSubSection).style.display = "none";
	
	var temp = e.id.split("_");
	// show image
 	document.getElementById('b'+e.id).style.background = "url(images/portfolio/" + temp[1] + ".jpg)";
	
}

function rollOut(e) {

	if (prevImage != null) prevImage.onmousemove = null;
	if (nextImage != null) nextImage.onmousemove = null;
	
	if (e.id == currentImage) {
  	document.getElementById('b'+e.id).style.opacity = "";
  	document.getElementById('b'+e.id).style.filter = "alpha(opacity=100);";
	}
	if (e.id == currentImage || scrolling == true) {
  	document.getElementById('i'+currentImage).style.display='none';
		var n = parseInt(e.className);
		var currentN = parseInt(document.getElementById(currentImage).className);
		if ( n != (currentN - 1) && n != (currentN + 1)) {
			return false;
		}
	}
	
 	//document.getElementById('b'+e.id).style.opacity = 0;
 	//document.getElementById('b'+e.id).style.filter = "alpha(opacity=0);";
	//document.getElementById('b'+e.id).style.background = "url(images/x.gif)";
}

function preloadImages() {

	var e = document.getElementById(currentImage);
	var n = parseInt(e.className);
	
	// push previous/next images onto queue
	// mac IE problem here
	if (n > 0) {
		var temp = images_array[n-1].split("_");
		if (temp.length > 2) {
			var url = "images/portfolio/" + temp[1] + ".jpg";
			loadQueue[loadQueue.length] = url;
		} else {
			var url = "images/portfolio/" + temp[1] + ".jpg";
			loadQueue[loadQueue.length] = url;
		}
	}
	
	if (n < (images_array.length-1)) {
		var temp = images_array[n+1].split("_");
		if (temp.length > 2) {
			var url = "images/portfolio/" + temp[1] + ".jpg";
			loadQueue[loadQueue.length] = url;
		} else {
			var url = "images/portfolio/" + temp[1] + ".jpg";
			loadQueue[loadQueue.length] = url;
		}
	}
	
	// push all other images onto queue
	var nx = n - 1;
	while (nx > 0) {
	
		nx--;
		//alert(nx);
		
		var temp = images_array[nx].split("_");
		if (temp.length > 2) {
			var url = "images/portfolio/" + temp[1] + ".jpg";
			loadQueue[loadQueue.length] = url;
		} else {
			var url = "images/portfolio/" + temp[1] + ".jpg";
			loadQueue[loadQueue.length] = url;
		}
		
	
	}
	
	var nx = n + 1;
	while (nx < (images_array.length-1)) {
	
		nx++;
		
		var temp = images_array[nx].split("_");
		if (temp.length > 2) {
			var url = "images/portfolio/" + temp[1] + ".jpg";
			loadQueue[loadQueue.length] = url;
		} else {
			var url = "images/portfolio/" + temp[1] + ".jpg";
			loadQueue[loadQueue.length] = url;
		}
		
	
	}
	
	loadImages();

}

function loadImages() {

	var url = loadQueue[0];
	for (var i in loadQueue) {
		if (i != 0) {
			loadQueue[i-1] = loadQueue[i];
		}
	}
	loadQueue.length = loadQueue.length-1;
	
	var tempImage = new Image(0,0);
	tempImage.src = url;
	if (loadQueue.length >= 1) {
		tempImage.onload = function() {
			loadImages();
		}
	}

}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_nbGroup(event, grpName) { //v6.0
  var i,img,nbArr,args=MM_nbGroup.arguments;
  if (event == "init" && args.length > 2) {
    if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
      img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
      if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
      nbArr[nbArr.length] = img;
      for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
        if (!img.MM_up) img.MM_up = img.src;
        img.src = img.MM_dn = args[i+1];
        nbArr[nbArr.length] = img;
    } }
  } else if (event == "over") {
    document.MM_nbOver = nbArr = new Array();
    for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = (img.MM_dn && args[i+2]) ? args[i+2] : ((args[i+1])? args[i+1] : img.MM_up);
      nbArr[nbArr.length] = img;
    }
  } else if (event == "out" ) {
    for (i=0; i < document.MM_nbOver.length; i++) {
      img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
  } else if (event == "down") {
    nbArr = document[grpName];
    if (nbArr)
      for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
    document[grpName] = nbArr = new Array();
    for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = img.MM_dn = (args[i+1])? args[i+1] : img.MM_up;
      nbArr[nbArr.length] = img;
  } }
}

function index_on_load() {
  MM_preloadImages('images/nava1.gif','images/nava2.gif','images/nava3.gif','images/nava4.gif');
  //setInterval("slideshow()", timeDelay); 
}
 
function confdel(url,msg) {
  if (typeof(msg)=='undefined') { 
    msg="Are you sure you want to do this?\nThis action could not be undone!";
  }
  if (confirm(msg)) {
    location.href=url;
  }
}

function arrhover(e) {
  if(e.alt=="next") {
  	e.src="images/arra.gif";
	}
	else {
  	e.src="images/brra.gif";
	}
}
function arrunhover(e) {
  if(e.alt=="next") {
  	e.src="images/arrp.gif";
	}
	else {
  	e.src="images/brrp.gif";
	}
}