function showMenu(cssClass)
{
	hideAllMenuItems();

	$('#' +  cssClass).toggleClass("submenue_hidden");

}

function hideAllMenuItems()
{
	$('.submenu').addClass('submenue_hidden')
}

function changeSubMenueImage(image,cssID)
{
	var imgSrc = "url(" + image + ")";
    $('#' + cssID).css('backgroundImage', imgSrc);
}