function learnMore(content)	{
		
	// create a variable for a quickie reference
	var element = document.getElementById(content);
	var intro = document.getElementById('intro_'+content);
	
	// now set the display for the relevant section
	if (element.style.display == 'none') {
		intro.style.display="none";
		element.style.display="inline";
	} else {
		intro.style.display="inline";
		element.style.display="none";
	}
	
} // finish up