function fontsizeup() 
{	
	active = getActiveStyleSheet();

	switch (active) 
	{
		case 'A--' : 
			setActiveStyleSheet('A-');
		break;
		
		case 'A-' : 
			setActiveStyleSheet('A');
		break;
		
		case 'A' : 
			setActiveStyleSheet('A+');
		break;
		
		case 'A+' : 
			setActiveStyleSheet('A++');
		break;
		
		case 'A++' :
		break;
		
		default :
			setActiveStyleSheet('A');
		break;
	}
}

function fontsizedown() 
{
	active = getActiveStyleSheet();

	switch (active) 
	{
		case 'A++' : 
			setActiveStyleSheet('A+');
		break;

		case 'A+' : 
			setActiveStyleSheet('A');
		break;

		case 'A' : 
			setActiveStyleSheet('A-');
		break;

		case 'A-' : 
			setActiveStyleSheet('A--');
		break;

		case 'A--' : 
		break;

		default :
			setActiveStyleSheet('A--');
		break;
	}
}