function showContent(id,total){  

	//Clean up - Hide All
	for (i=0; i<=total; i++) {  
		var pid = 'pic' + i;
    	document.getElementById(id).style.display = 'none';
		document.getElementById('overlay').style.display = 'none';
	}                    
	//Unhide 
	if (id != null) {
		document.getElementById(id).style.display = 'block';
		document.getElementById('overlay').style.display = 'block';
	}
	
}

function hideContent(id,total){  
	//Clean up - Hide All
	for (i=0; i<=total; i++) {  
		var pid = 'pic' + i;
    	document.getElementById(id).style.display = 'none';
		document.getElementById('overlay').style.display = 'none';
	}                    
	
}