var oldState = '';

function tabActivate(tab) {
	var tabLeft = document.getElementById('tab'+tab+'-left');
	var tabImg = document.getElementById('tab'+tab+'-img');
	var tabMiddle = document.getElementById('tab'+tab+'-middle');
	var tabRight = document.getElementById('tab'+tab+'-right');
	
	if (tabLeft.className.substr(tabLeft.className.length-2, tabLeft.className.length) == '-a')
		oldState = '-a';
	else
		oldState = '';
	
	tabLeft.className = "tab-left-a";
	tabImg.className = "tab-img-a";
	tabMiddle.className = "tab-middle-a";
	tabRight.className = "tab-right-a";
}

function tabDeactivate(tab) {
	var tabLeft = document.getElementById('tab'+tab+'-left');
	var tabImg = document.getElementById('tab'+tab+'-img');
	var tabMiddle = document.getElementById('tab'+tab+'-middle');
	var tabRight = document.getElementById('tab'+tab+'-right');
	
	tabLeft.className = "tab-left" + oldState;
	tabImg.className = "tab-img" + oldState;
	tabMiddle.className = "tab-middle" + oldState;
	tabRight.className = "tab-right" + oldState;
}