//hide layers
function hide(target) {

	obj=document.getElementById(target);
	if(obj) {
		obj.style.display = 'none';
	}
	//if(target == "bm") alert(target);
}

//show layers
function show(target) {

	obj=document.getElementById(target);
	if(obj) {
		obj.style.display = 'block';
	}
	
}
// toggle
function toggle(target) {

	obj=document.getElementById(target);
	obj.style.display=( (obj.style.display=='none') ? '' : 'none');
}
/*
function bcycle_dwn_lo() {
	godwn_lo = setInterval('cbtns_dwn_lo()', 200);
}
*/
intstarted = '';
function starthide(target) {
	//alert(target);
	var thet = target;
	hidewin = setInterval('hide(\''+thet+'\')', 600);
	intstarted = 1;
}
function checkint() {
	if(intstarted) clearInterval(hidewin);
	intstarted = '';
}

/// use query strings
function Querystring(qs) { // optionally pass a querystring to parse
	this.params = new Object()
	this.get=Querystring_get
	
	if (qs == null)
		qs=location.search.substring(1,location.search.length)

	if (qs.length == 0) return

// Turn <plus> back to <space>
// See: http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13.4.1
	qs = qs.replace(/\+/g, ' ')
	var args = qs.split('&') // parse out name/value pairs separated via &
	
// split out each name=value pair
	for (var i=0;i<args.length;i++) {
		var value;
		var pair = args[i].split('=')
		var name = unescape(pair[0])

		if (pair.length == 2)
			value = unescape(pair[1])
		else
			value = name
		
		this.params[name] = value
	}
}

function Querystring_get(key, default_) {
	// This silly looking line changes UNDEFINED to NULL
	if (default_ == null) default_ = null;
	
	var value=this.params[key]
	if (value==null) value=default_;
	
	return value
}