function navigationRoll(subNavId){
	var id= subNavId + "SubNav";
	document.getElementById(id).style.display="block";

}
function navigationRollout(subNavId){
	var id= subNavId + "SubNav";
	document.getElementById(id).style.display="none";
}



/** functions for loading google map on locations page **/
/** NOTE!  The Javascript includes require a unique key registered to norcalathletics.com **/
function loadMap(lat, lng, showMarker) {
	document.getElementById("mapHolder").innerHTML="loading...";
	if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("mapHolder"));
        map.setCenter(new GLatLng(lat, lng), 13);		//center map on location
		map.addControl(new GSmallMapControl());			//add controls for zoom
        map.addControl(new GMapTypeControl());			//add controls for map/satellite/hybrid
		
		if(showMarker){
			var point = new GLatLng(lat, lng);	//add marker to map
        	map.addOverlay(new GMarker(point));
		}
	}
}






/** functions for carousel of images in header **/


var lastRan = -1;
var fmtItem = function(imgUrl, url, title) {
	var innerHTML = '<img src="' + imgUrl + '" width="' + 75 + '" height="' + 75+ '"/>';
    return innerHTML;
};

var loadInitialItems = function(type, args) {
    var start = args[0];
    var last = args[1]; 
    load(this, start, last);    
};

var loadNextItems = function(type, args) {    
    var start = args[0];
    var last = args[1]; 
    var alreadyCached = args[2];
    
    if(!alreadyCached) {
        load(this, start, last);
    }
};

var loadPrevItems = function(type, args) {
    var start = args[0];
    var last = args[1]; 
    var alreadyCached = args[2];
    
    if(!alreadyCached) {
        load(this, start, last);
    }
};

var handlePrevButtonState = function(type, args) {
    var enabling = args[0];
    var leftImage = args[1];
    if(enabling) {
        leftImage.src = "/img/carouselPreviousButton.png";    
    } else {
        leftImage.src = "/img/carouselPreviousButton.png";
    }
    
};

var load = function(carousel, start, last) {
    for(var i=start;i<=last;i++) {
        var randomIndex = getRandom(imageList.length, lastRan);
        lastRan = randomIndex;
        carousel.addItem(i, fmtItem(imageList[randomIndex], urlList[randomIndex], "Number " + i));
    }
};

var getRandom = function(max, last) {
    var randomIndex;
    do {
        randomIndex = Math.floor(Math.random()*max);
    } while(randomIndex == last);
    
    return randomIndex;
};






var pageLoad = function() 
{
var carousel = new YAHOO.extension.Carousel("mycarousel", 
	{
		"numVisible":        3,
		"animationSpeed":    0.25,
		"scrollInc":         3,
		"navMargin":         40,
		"prevElement":       "prev-arrow",
		"nextElement":       "next-arrow",
		"loadInitHandler":   loadInitialItems,
		"loadNextHandler":   loadNextItems,
		"loadPrevHandler":   loadPrevItems,
		"prevButtonStateHandler":   handlePrevButtonState
	}
);
}

YAHOO.util.Event.addListener(window, 'load', pageLoad);