function newImage(arg) 
{
	if (document.images) 
	{
		rslt = new Image();
		rslt.src = "/images/" + arg;
		return rslt;
	}
}

function changeImages() 
{
	if (document.images && (preloadFlag == true)) 
	{
		for (var i=0; i<changeImages.arguments.length; i+=2) 
		{
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

function mouserOverMenu()
{
	prefix = "";
	if (mouserOverMenu.arguments[1])
	{
		prefix = mouserOverMenu.arguments[1];
	}
	
	changeImages(mouserOverMenu.arguments[0], prefix + 'images/menu/'+ mouserOverMenu.arguments[0] +'-over.gif');
}

function mouserOutMenu()
{
	prefix = "";
	if (mouserOutMenu.arguments[1])
	{
		prefix = mouserOutMenu.arguments[1];
	}
	changeImages(mouserOutMenu.arguments[0], prefix + 'images/menu/'+ mouserOutMenu.arguments[0] +'.gif');
}

var preloadFlag = false;
function preloadImages() {
	prefix = "";
	if (preloadImages.arguments[0])
	{
		prefix = preloadImages.arguments[0];
	}
	if (document.images) {
		menu_1_over = newImage("../images/menu/menu_1-over.gif");
		menu_2_over = newImage("../images/menu/menu_2-over.gif");
		menu_3_over = newImage("../images/menu/menu_3-over.gif");
		menu_4_over = newImage("../images/menu/menu_4-over.gif");
		preloadFlag = true;
	}
}