// JavaScript Document
function toTextVersion(){
	for(var i = 0; i < document.styleSheets.length; i++){
	  	document.styleSheets[i].disabled = true;
	}
	
	var images = document.getElementsByTagName('img');
	for(var i = 0; i < images.length; i++){
	  	images[i].style.display = 'none';
	}
}

function toGraphicVersion(){
	for(var i = 0; i < document.styleSheets.length; i++){
	  	document.styleSheets[i].disabled = false;
	}
	
	var images = document.getElementsByTagName('img');
	for(var i = 0; i < images.length; i++){
	  	images[i].style.display = '';
	}
}