var logShowHide = 0

function showhide(showhich){
		
	for(i = 1; i < 6; i++){
		document.getElementById('challenge' + i + 'Box').style.display = 'none'
		document.getElementById('arrow'+i).src = 'images/our-challenge/left.gif'
	}
	
	if(logShowHide != showhich){
		document.getElementById('challenge' + showhich + 'Box').style.display = 'block'
		document.getElementById('arrow'+showhich).src = 'images/our-challenge/down.gif'
		logShowHide = showhich
	}else{
		logShowHide = 0
	}
	
}