/////////////////// UTILITY FUNCTIONS ///////////////////

function hideshow(which){
	var layer; 
	layer=document.getElementById(which);
	if (layer.style.display=="block") {
		layer.style.display="none"; 
	} else {
		layer.style.display="block"; 
	} 
}

// make sure they entered something when validating a form
function checkInput(str, output) {
	var msg="";
	if (str=="") msg=msg+output+'\n';
	return msg;
}