var instrument = '';

function setRandom() {
       var number_of_bgs = 12;
       var ran_unrounded=Math.random() * (number_of_bgs-1);
       randnum = Math.round(ran_unrounded)+1;
}

function setBg() {
	if(instrument == ''){
	setRandom();
	var bgurl = 'http://www.bravomusiclessons.com/imgs/header/' + randnum + '.jpg';
	document.getElementById('header').style.backgroundImage = 'URL('+bgurl+')';
   img1 = new Image();
   img1.src = bgurl;
	}
}

var loc = 0;

var statedropdown = '';
var previousloc = 0;
function showRates(){
	
	statedropdown = document.getElementById("state").value;
	
	if (loc>0) {
		document.getElementById(loc).style.display = 'none';
	}
	
	var myindex2  = document.getElementById(statedropdown).selectedIndex;
	loc = document.getElementById(statedropdown).options[myindex2].value;	
	
	previousloc = loc;
	if (loc>0) {
	document.getElementById(loc).style.display = 'block';
	} else if (loc=0){
	document.getElementById(previousloc).style.display = 'none';	
	}
}

var state = '';
var previousstate = '';
function showState(state){
if (state !=''){
if (previousstate !=''){document.getElementById(previousstate).style.display = 'none';}
	document.getElementById('locationempty').style.display = 'none';
    document.getElementById(state).style.display = 'inline';
} else {
	document.getElementById('locationempty').style.display = 'inline';
    document.getElementById(previousstate).style.display = 'none';
}
previousstate = state;
}