function changeText(sectionOn,sectionOff){
//	alert(sectionOn);
	document.getElementById(sectionOn).style.display = 'inline';
	document.getElementById(sectionOff).style.display = 'none';
	
	// change tab images
	var onTab = sectionOn + "Tab";
	var offTab = sectionOff + "Tab";
	
	document.getElementById(onTab).src = "images/boat-tab-" + sectionOn + ".jpg";
	document.getElementById(offTab).src = "images/boat-tab-" + sectionOff + "-f2.jpg";
}

function changeImage(imageName){
	
	document.mainImage.src = imageName;
}