function increaseBodySize(){
	var myClass=document.getElementById('myBody').className
	switch(myClass){
		case 'xx-small':
			document.getElementById('myBody').className = 'x-small';
			break;
		case 'x-small':
			document.getElementById('myBody').className = 'small';
			break;
		case 'small':	
			document.getElementById('myBody').className = 'normal';
			break;
		case 'normal':
			document.getElementById('myBody').className = 'large';
			break;
		case 'large':
			document.getElementById('myBody').className = 'x-large';
			break;
		case 'x-large':	
			document.getElementById('myBody').className = 'xx-large';
			break;
		case 'large':
			//do nothing
			break;
	};

}

function decreaseBodySize(){
	var myClass=document.getElementById('myBody').className
	switch(myClass){
		case 'xx-small':
			//do nothing
			break;
		case 'x-small':
			document.getElementById('myBody').className = 'xx-small';
			break;
		case 'small':	
			document.getElementById('myBody').className = 'x-small';
			break;
		case 'normal':
			document.getElementById('myBody').className = 'small';
			break;
		case 'large':
			document.getElementById('myBody').className = 'normal';
			break;
		case 'x-large':	
			document.getElementById('myBody').className = 'large';
			break;
		case 'xx-large':
			document.getElementById('myBody').className = 'x-large';
			break;
	};

}

function popUpWindow(url, name, width, height){
	var myWindow = window.open(url, name, 'status=0, toolbar=0, location=0, menubar=1, height=' + height + ', width='+ width);	
	myWindow.focus();
}