var fontsize = 2;
var fontsizes = ['smallest', 'small', 'normal', 'large', 'largest'];


function fontsize_smaller(){
	fontsize = fontsize - 1;
	if(fontsize == 0){
		document.getElementById('small_image').style.visibility = "hidden";	
	}
	if(fontsize > -1){
	document.getElementById('big_image').style.visibility = "visible";	
	document.getElementById('font_size').className = fontsizes[fontsize];
	}
}

function fontsize_bigger(){
	fontsize = fontsize + 1;
	if(fontsize == 4){
		document.getElementById('big_image').style.visibility = "hidden";	
	}

	if(fontsize < 5){
	document.getElementById('small_image').style.visibility = "visible";	
	document.getElementById('font_size').className = fontsizes[fontsize];
	}
}


function fontsizestandard(){
	fontsize = 2;
	document.getElementById('font_size').className = 'normal';
	document.getElementById('big_image').style.visibility = "visible";
	document.getElementById('small_image').style.visibility = "visible";
}

function checkForm(form){
	var msg = '';
	var error = false;

	if(form.gb_author.value.length < 1){
		msg += 'Uw naam mag niet leeg zijn of moet langer zijn!\n';
		error = true;
	}

	if(form.gb_message.value.length < 9){
		msg += 'Bericht moet langer zijn dan 10 karakters!\n';
		error = true;
	}
	if(error == true){
		alert(msg);
		return false;
	}

	return true;
}

function StartUp() {	
	new Protofade('protofade', { Random:true });	
}

document.observe ('dom:loaded', StartUp);