function show2(section) {
	div = document.getElementById('bottom' + section);
	tab = document.getElementById('tab' + section);
	var tabs = new Array('tab1','tab2','tab3', 'tab4');
	var divs = new Array('bottom1','bottom2','bottom3', 'bottom4');
	for(i in divs){
		d = document.getElementById(divs[i]);
		if(d){
			d.style.display = 'none';
		}
	}	

	for(i in tabs){
		d = document.getElementById(tabs[i]);
		if(d){
			d.className = d.className.replace(/active/g,'');
		}
	}	

		div.style.display = 'block';
		tab.className += ' active';

}