function resetContent() {

	/*showAboutContent('main');
	document.getElementById('about_thumb_science2').style.backgroundImage = 'url(images/service/science-on.jpg)';*/
	/*
	// un-highlight all other thumbs, except active one
	var thumbs = ['about_thumb_design', 'about_thumb_science', 'about_thumb_consumer', 'about_thumb_business'];
	
	for (var i = 0; i < thumbs.length; i++) {
		var temp_thumb = thumbs[i];
		document.getElementById(temp_thumb).style.backgroundPosition = '0 141px';
	}
	*/
}

function showAboutContent(cat) {

	// hide all content boxes, except active one
	var content_boxes = ['about_design', 'about_science', 'about_consumer', 'about_business', 'about_main'];
	var active_content_box = 'about_' + cat;
	
	for (var i = 0; i < content_boxes.length; i++) {
		var temp_content_box = content_boxes[i];
		if (temp_content_box == active_content_box) {
			document.getElementById(temp_content_box).style.display = '';
		} else {
			document.getElementById(temp_content_box).style.display = 'none';
		}
	}
	
	// un-highlight all other thumbs, except active one
	var thumbs = ['design', 'science', 'consumer', 'business'];
	var active_thumb = 'about_thumb_' + cat;
	
	for (var i = 0; i < thumbs.length; i++) {
		var temp_thumb = thumbs[i];
		var thumb = 'about_thumb_' + temp_thumb + '4';
		if (cat !== 'main') 
		{
			if (temp_thumb == cat) 
			{
				document.getElementById(thumb).style.backgroundImage = 'url(images/service/' + temp_thumb + '-on.jpg)';
			} else {
				document.getElementById(thumb).style.backgroundImage = 'url(images/service/' + temp_thumb + '-off.jpg)';
				
			}
		} 
		else 
		{
			document.getElementById(thumb).style.backgroundImage = 'url(images/service/' + temp_thumb + '-off.jpg)';	
		}
	}
	
}

function preloadApproachImages() {

	if (document.getElementById('about_thumb_design')) {
	
		pic1 = new Image(121, 141); 
  		pic1.src = "images/service/design-on.jpg";
  		
  		pic2 = new Image(121, 141); 
  		pic2.src = "images/service/science-on.jpg";
  		
  		pic3 = new Image(121, 141); 
  		pic3.src = "images/service/consumer-on.jpg";
  		
  		pic4 = new Image(121, 141); 
  		pic4.src = "images/service/business-on.jpg";
	}
}