// JavaScript Document

function toggleDisplay(image, block){
	//MM_swapImage('NvClasses','','images/NvClasses-ovr.gif',1)" 
	//MM_swapImgRestore()";
	if(image != null){
		imageObj = document.getElementById(image);
		imgReg = /closed\.jpg/;
		if(imageObj.src.match(imgReg)){
			imageObj.src = "images/open.jpg";
		} else{
			imageObj.src = "images/closed.jpg";
		}
	}
	node = document.getElementById(block);
	if(node.style.display == "none"){
		node.style.display = "block";
	} else{
		node.style.display = "none";
	}
}

function toggleGroup(target, group){
	if(target == null){
		return false;
	}
	for(i=0;i<group.length;i++){
		if(document.getElementById(group[i]) != target){
			document.getElementById(group[i]).style.display = 'none';
		};
	}
	document.getElementById(target).style.display = 'block';
}

function showCheck(){
	document.getElementById('paypalPurchase').style.display = "none";
	document.getElementById('checkPurchase').style.display = "block";
}
function showPaypal(){
	document.getElementById('checkPurchase').style.display = "none";
	document.getElementById('paypalPurchase').style.display = "block";
}