// javascript document for tabbed navigation

function changeTab(currentTab) {
	switch (currentTab){
		case 1:
			document.getElementById("buttons_main").style.backgroundPosition="0 -0px";
			document.getElementById("page1").style.display="block";
			document.getElementById("page2").style.display="none";
			document.getElementById("page3").style.display="none";
			break;
		case 2:
			document.getElementById("buttons_main").style.backgroundPosition="0 -75px";
			document.getElementById("page1").style.display="none";
			document.getElementById("page2").style.display="block";
			document.getElementById("page3").style.display="none";
			break;
		case 3:
			document.getElementById("buttons_main").style.backgroundPosition="0 -150px";
			document.getElementById("page1").style.display="none";
			document.getElementById("page2").style.display="none";
			document.getElementById("page3").style.display="block";
			break;
	}
}