//browser detection
var agt=navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);
var is_opera = (agt.indexOf("opera") != -1);
var is_ie     = ((agt.indexOf("msie") != -1) && (!is_opera));
var is_ie3    = (is_ie && (is_major < 4));
var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
var is_mac    = (agt.indexOf("mac")!=-1);


var preloaded = [];

// here is a lame preloading script i am putting in just for demonstration
for (var i = 1; i <= 10; i++) {
	preloaded[i] = [loadImage(i + "-0.gif"), loadImage(i + "-1.gif")];
}


function init() {
	//==========================================================================================
	// if supported, initialize TransMenus
	//==========================================================================================
	// Check isSupported() so that menus aren't accidentally sent to non-supporting browsers.
	// This is better than server-side checking because it will also catch browsers which would
	// normally support the menus but have javascript disabled.
	//
	// If supported, call initialize() and then hook whatever image rollover code you need to do
	// to the .onactivate and .ondeactivate events for each menu.
	//==========================================================================================
	if (TransMenu.isSupported()) {
		TransMenu.initialize();

		// hook all the image swapping of the main toolbar to menu activation/deactivation
		// instead of simple rollover to get the effect where the button stays hightlit until
		// the menu is closed.
		menu1.onactivate = function() { swapImage("button1", preloaded[1][1].src) };
		menu1.ondeactivate = function() { swapImage("button1", preloaded[1][0].src) };

		menu2.onactivate = function() { swapImage("button2", preloaded[2][1].src) };
		menu2.ondeactivate = function() { swapImage("button2", preloaded[2][0].src) };

		menu3.onactivate = function() { swapImage("button3", preloaded[3][1].src) };
		menu3.ondeactivate = function() { swapImage("button3", preloaded[3][0].src) };

		menu4.onactivate = function() { swapImage("button4", preloaded[4][1].src) };
		menu4.ondeactivate = function() { swapImage("button4", preloaded[4][0].src) };

		menu5.onactivate = function() { swapImage("button5", preloaded[5][1].src) };
		menu5.ondeactivate = function() { swapImage("button5", preloaded[5][0].src) };
		
		menu6.onactivate = function() { swapImage("button6", preloaded[6][1].src) };
		menu6.ondeactivate = function() { swapImage("button6", preloaded[6][0].src) };

		menu7.onactivate = function() { swapImage("button7", preloaded[7][1].src) };
		menu7.ondeactivate = function() { swapImage("button7", preloaded[7][0].src) };
		
		menu8.onactivate = function() { swapImage("button8", preloaded[8][1].src) };
		menu8.ondeactivate = function() { swapImage("button8", preloaded[8][0].src) };	

		menu9.onactivate = function() { swapImage("button9", preloaded[9][1].src) };
		menu9.ondeactivate = function() { swapImage("button9", preloaded[9][0].src) };	

		menu10.onactivate = function() { swapImage("button10", preloaded[10][1].src) };
		menu10.ondeactivate = function() { swapImage("button10", preloaded[10][0].src) };	
	}
}        
		
// this is a crappy example preloader. Use whichever one you want.
function loadImage(sFilename) {
	var img = new Image();
	img.src ="images/nav/" + sFilename;
	return img;
}

// this is a crappy example image swapper. Use whichever you want.
	function swapImage(imgName, sFilename) {
	document.images[imgName].src = sFilename;
}