var show_it = "visible";
var hide_it = "hidden";
var timer = new Array;
var timer2 = new Array;

// get version - returns 0 if not IE 5.5 or higher
var version = 0;

if (navigator.appVersion.indexOf("MSIE")!=-1) {
	temp = navigator.appVersion.split("MSIE");
	version = parseFloat(temp[1]);
}

function toggleLayer(id) {
	if (document.getElementById) {
		
		if (document.getElementById) {
			var obj = document.getElementById(id).style;
		}
		
		if (obj.visibility == hide_it) {
			obj.visibility = show_it;
		}
		else {
			obj.visibility = hide_it;
		}
	}
}

function showLayer(id) {
	if (document.getElementById) {
		var obj = document.getElementById(id).style;
		obj.visibility = "visible";
	}
}

function hideLayer(id) {
	if (document.getElementById) {
		clearTimeout(opac_timer_show[id]);
		
		var obj = document.getElementById(id).style;
		
		obj.visibility = hide_it;
		obj.filter = "alpha(opacity=0, style=0)";
		obj.opacity = 0;
		obj.KhtmlOpacity = 0;
		opac[id] = 0;
		// set the opacity to 0 for the show function		
	}
}

var opac = new Array;
var opac_timer_show = new Array;
var opac_timer_hide = new Array;


function showLayerOp(id) {
	if (opac[id] == "" || opac[id] == null) {
		opac[id] = 1;
	}
	
	var obj = document.getElementById(id).style;
	
	obj.visibility = "visible";
	
	if (opac[id] <= 100) {
		obj.filter = "alpha(opacity=" + opac[id] + ", style=0)";
		obj.opacity = opac[id] /100;
		obj.KhtmlOpacity = (opac[id] / 100);
		opac[id] += 33;
		opac_timer_show[id] = setTimeout("showLayerOp(\""+id+"\")",100);
	}
	else {
		clearTimeout(opac_timer_show[id]);
	}
}

var timerbox = new Array;

function closeCounter(id) {
	timerbox[id] = "hideLayer('"+id+"')";
	timer[id] = setTimeout (timerbox[id], 150);
}

function closeCounter2(id) {
	var timerbox = "hideLayer('"+id+"')";
	timer2[id] = setTimeout (timerbox, 150);
}

function hovChange(id) {
	var filename = document.getElementById(id).src;
	var extension = filename.charAt(filename.length-3) + filename.charAt(filename.length-2) + filename.charAt(filename.length-1);
	
	if (filename.charAt(filename.length-5) == "_") {
		filename = filename.substring(0,filename.length-5) + "." + extension;
	}
	else {
		filename = filename.substring(0,filename.length-4) + "_." + extension;
	}
	
	document.getElementById(id).src = filename;
}

//sort through querystring using javascript
function getQuery(variable) {
	var i;
	var query = window.location.search.substring(1);
	var vars = query.split("&");
	
	for (i = 0; i < vars.length; i++) {
		var pair = vars[i].split("=");
		if (pair[0] == variable) {
			return pair[1];
		}
	}
}

//typical Hide Show using display attribute
function hide(id) {
	document.getElementById(id).style.display = 'none';
}

function show(id) {
	document.getElementById(id).style.display = 'block';
}