var ignore = "";
	var activeID = "1";
	
	function boilerMenuOn(id) {

		for(i=2; i<6; i++) {
			document.getElementById("boiler-nav-"+i).className = "passive";
		}
		
		document.getElementById("boiler-nav-"+id).className = "active";
		document.getElementById("boiler-nav-"+id).style.cursor = "pointer";
		document.getElementById("boiler-"+activeID).style.display = "none";
		document.getElementById("boiler-"+id).style.display = "block";
		
		activeID = id;
		
	}
	
	
	function boilerMenuOff(id) {
		if(id == ignore) {
			document.getElementById("boiler-nav-"+id).className = "active";
		}
		if(id != ignore) {
			document.getElementById("boiler-nav-"+id).className = "passive";
		}

	}
	
	
	
	function showBoiler(id) {
		for(i=1; i<5; i++) {
			document.getElementById("boiler-nav-"+i).className = "passive";
		}
		document.getElementById("boiler-nav-"+id).className = "active";
		document.getElementById("boiler").style.display = "none";
		document.getElementById("boiler-"+id).style.display = "block";
		if(ignore != "") {
			document.getElementById("boiler-"+ignore).style.display = "none";
		}
		ignore = id;
	}
	
	
	
	var index=1;
	var rotation = "";
	 
	function start() {
		rotation = setInterval("rotate()", 7000);
	}
	
	function rotate() {
		index++;
		if(index=="6") {
			index = 1;
		}
		
		document.getElementById("top-1").style.display = "none";
		document.getElementById("top-2").style.display = "none";
		document.getElementById("top-3").style.display = "none";
		document.getElementById("top-4").style.display = "none";		
		document.getElementById("top-5").style.display = "none";		
		document.getElementById("top-"+index).style.display = "block";
	}