function changeTabs(anchor){
				document.getElementById('featuresAnchor').className 		= 'tab';
				document.getElementById('treatmentsAnchor').className 		= 'tab';

				
				document.getElementById('features').style.display	= 'none';
				document.getElementById('treatments').style.display	= 'none';

				
				switch(anchor){
					case 'featuresAnchor':
						document.getElementById(anchor).className 				= 'tab';					
						document.getElementById('features').style.display	= 'block';
						break;
					case 'treatmentsAnchor':
						document.getElementById(anchor).className 				= 'tab';		
						document.getElementById('treatments').style.display	= 'block';
						break;

					default:
						document.getElementById(anchor).className 				= 'tab';						
						document.getElementById('features').style.display	= 'block';
					
				}
			}